Rusty Questions

Spring Time Review 

As Spring approaches, the days get longer and so our project list grows.  Mark sent us an email about using Rust Doctor on rust. He has several projects he want to tackle and had questions regarding using Rust Doctor on his rusted metal. These questions might help clarify projects you are working on this Spring.

Q:  When painted metal has been out side and there is rust coming through the painted steel, do you just knock off all the loose particles then apply Rust Doctor over everything?

A:  On painted steel that is showing rust, you will need to remove any loose paint to expose the rust underneath. Rust Doctor must come in contact with the rust in order to convert it to the non-rusting black iron oxide called magnetite. You can the paint over the entire surface to stop any rust anywhere on the surface. Even the smallest nick in the paint will contain rust and Rust Doctor will eliminate the rust.  In addition to stopping the rust, Rust Doctor leaves a clear primer on the entire surface you treated so you can top coat without priming.  

Q:  Can you apply Rust Doctor over new steel and have the same effect or should I let the new steel sit outside and become slightly rusty, then apply the rust doctor ?

A:  On new steel, it is best to have a coating of rust so the Rust Doctor can covert the rust to magnetite, giving you permanent protection from future rusting. More rust is better than slightly rusty as the thicker the rust, the thicker the magnetite protection.

 Q:  Can you apply rust doctor over cleaned weld joints or do you need them to “rust up” too?

A:  On clean weld joints, you would want a rust coating just like on the bare steel. If there is no rust, you will have steel with a clear latex primer but no magnetite protection.

Q:  How much coverage to you get out of a gallon of Rust Doctor?  I have a lot of outdoor structural steel that needs painted.  This steel is somewhat rusty. Do I want to knock the loose pieces off then paint it with the Rust Doctor?

A:  A gallon of Rust Doctor will cover 200 square feet of rusty metal. Yes you would need to knock off the loose rust and loose paint.  We have found a great way to clean the surface and remove the loose rust and paint.  Our  Grease Doctor is a cleaner/ degreaser that removes dirt, grease and oil from the surface of the metal. You mix water with the concentrated Grease Doctor according to how strong a cleaner you want. There are mixing instructions on the label.  Apply the Grease Doctor to the surface with a spray bottle or garden sprayer. Brush the surface with a wire brush or Scotch Brite Pad. This works the cleaner into the surface and removes loose rust or paint. Rinse the surface with water to remove contamination, loose rust and paint from the surface.  If you have a pressure washer, you can rinse the surface using the pressure washer to skip the wire brushing process.  Always check the surface and make sure you have removed all the loose material. Make sure the cleaned surface is dry before treating it with Rust Doctor. Q:  Can I apply a galvanized paint to the Rust Doctor treated surface? A: There are so many different formulations of galvanized paint; we can only advise that you check with the manufacturer of the galvanized paint to insure that their product can be applied over a latex primer. Rust Doctor leaves a latex primer on the surface as well as converting the rust. ______________________________________________________________________________________________________ As a Springtime reminder- Rust Doctor is non-toxic, bio-degradable  and non-flammable which is good for all of us and the environment.

NontoxicWe invite you to contact us with your questions about Rust Doctor products and how to best use them.

On the home page you will also see our Rust Doctor video showing you how to use the Rust Doctor

We love to feature projects from our customers who have had success with their rust metal projects.

Send us you before and after pictures and we will feature them on our Rust Doctor Blog.

Here is a picture of Martin’s John Deere Tractor.

Copy of tractor

usa

Rusty Metal is Everywhere!

The Rust Doctor is located in Southern Oregon, USA. But rusty metal is everywhere!

Rusty Metal is Worldwide

We get inquiries from all over the world.  Rust Doctor has been shipped to New Zealand,  Australia,  England,  Poland and other countries. When we got a recent email from a Dan in Canada about using Rust Doctor to remove rust on his car restoration project. We thought it might be a good time to give a review of the process on preparing a project for rust removal.  Here is what our technical team wrote to Dan in Canada.

______________________________________________________________________

 

HI Dan,

You can apply Rust Doctor over bare metal, paint and rust. Rust Doctor usually turns bare metal black because there is some rust in the metal, it just hasn’t come to the surface.  Of course Rust Doctor will turn the rust into a non-rusting black iron oxide but it won’t have any effect on the paint.  The entire treated surface will be left with a clear primer coating so you will see black and the paint through the clear primer.  Quite often there will be tiny nicks a scratches in the paint that have rust present so you will see these as black spots in the paint.  Sometimes they are so small; you don’t know the rust is there until you treat the surface with Rust Doctor. Then your project is ready for the next step in your restoration. You can paint with any paint you choose. You can easily use Rust Doctor and body fillers. Check out this blog post  on our site regarding body fillers.

Fillers

This is body filler on the Rust Doctor Ambulance

Regarding where you can use Rust Doctor, based on what I described above, you can use Rust Doctor anywhere on any part or location on a car.  Of course you will need to clean the surface before you use Rust Doctor.  Our Grease Doctor works very well for this purpose because it is a concentrate you mix with water.  You can adjust the strength of the product by adding more or less water.  For example, the engine compartment, undercarriage and frame are likely to have oil or grease on the surface so you use it straight or with one or two parts water as a degreaser.  Outside sheet metal may have light road oil residue along the bottom  while upper areas my only have oil from touching the surface or some other light residue so you can adjust the cleaning mixture accordingly.  Interior areas of the car are usually free of oil residue and can be cleaned with a ratio of ten parts water to one part Grease Doctor.  It is important to clean all areas to be treated as a clean surface is important before treating with Rust Doctor.  Be sure and rinse the surfaces with water to remove cleaner and surface contamination.  If you can’t rise with a hose, you can use a bucket and rags to rinse the surface.  As you probably know, preparation is the key to any successful painting project.

Unlike other products on the market, Rust Doctor is biodegradable, non-toxic, non-flammable and easy water clean up. You do not need specialized respirators as many solvent based products require. Check out this link from our Rust Doctor web site.

Nontoxic

We are happy to assist you with any future questions or technical help in removing rust.  Contact us here.

As a reminder, our Youtube (short version) video on how to use Rust Doctor is available on our website.  We also have a more detailed version for viewing.  We   address many car, home, and industrial use on our blog. Come and visit! FAQ

The Rust Doctor Team

Rust Doctor gets rid of rust

Rust Doctor gets rid of rust!

QUESTION: How to Remove Rust from My SUV

We get email questions that can also benefit our other readers. Here is an email from a Maryland reader. This customer is working to get rid of rust on his SUV and has some specific questions regarding rusty metal we would like to share with you.  This reader included his own pictures for illustration. We love to get pictures from our readers. If you have any before and after pictures of your projects, send them our way. We can feature your rusty metal projects in a future blog.

___________________________________________________________________________

1. Is Rust Doctor thin enough to be sprayed using a garden sprayer, such as the one below? If not, can it be thinned with water and retain its effectiveness if used in multiple coats? I’d like to use this wand to get down between inner and outer fender panels and other hard to reach places on my SUV.

garden sprayer

For “hard to reach” areas of rusty metal, reach for a garden sprayer, spray bottle or even a syringe.

Rust Doctor is thin enough to go through a garden sprayer.  However, the pressure in the sprayer is not enough to atomize the paint to give you a nice even spray.  For the use you describe, this process will work fine as the sprayer will get the Rust Doctor to the surfaces you want to treat, just not in a nice even spray.  You do not want to thin Rust Doctor as it will diminish the effectiveness of the product.  The viscosity of Rust Doctor is more fluid than Latex paint which allows you to use it in a spray gun with a latex tip.  Also, it is fluid enough to penetrate seams and crevices to convert rust to magnetite and completely seal them. This makes reaching those rusty spots easy for the restorer. That way you don’t have to take door panels etc. apart. Regarding multiple coats, usually only one coat of Rust Doctor is needed to treat a surface.  Heavy rust may require a second coat.  Apply the second coat of Rust Doctor while the first coat is still tacky.

 2. What is the “pot life” of Rust Doctor once a container has been opened?

You can open and close a container of Rust Doctor as much as necessary without affecting the two year shelf life. 

Make sure that Rust Doctor is not exposed to freezing weather.

3. Your site says Rust Doctor can be used over paint. If I treat the lower fender chips shown in the photo below, will it only affect the rust spots and leave the paint alone? In your video, it seemed to stain the paint, as well. My thought was to treat, fill the chips with filler, sand, and spray on a rubberized coating. Do you think that will work?

fender rust

Rusty spots on this customer’s SUV.

Rust Doctor does two things when you apply it to the surface of rusty metal or rusty metal and paint.  The rust converters change the red iron oxide we call rust to a non-rusting black iron oxide called magnetite which will never rust.  The magnetite actually protects the base metal from ever rusting.  The entire surface that is treated is covered with a clear latex primer.  So when you paint your lower fenders, the Rust Doctor will convert any rust on the surface to magnetite and coat the entire surface (paint and converted rust) with a latex primer.  You can then top coat the surface with any kind of paint, bed liner coating or sound deadening material.  Nothing in Rust Doctor will affect the paint.  The stains you refer to is some of the rust in the clear primer picked up by the brush and converted black magnetite.  This does not affect the surface in any way.  Your suggestion of filling the chipped spots after Rust Doctor treatment with filler and then painting with a rubberized coating should work just fine. The latex primer in Rust Doctor will fill the nicks to some degree, requiring less filler.  By the way, when you paint Rust Doctor on the fender you will see a lot more black spots on the surface than rust spots on the surface before treatment. That is because Rust Doctor finds any rust on the surface and coverts it to magnetite, even the tinniest little scratch or nick in the paint.

_____________________________________________________________________________________________________________________________

REMEMBER: Rust Doctor is non-toxic, non-flammable and biodegradable. All Rust Doctor products are made in the USA! 

 

RD logo

Your rusty metal solution is here!

 

For more information on how to use Rust Doctor on rusty metal, click here. If you need technical assistance, we are here to help! Please contact the Rust Doctor team for help.

What Paint Product to Use to Get Rid of Rust?

paint many colors

COLOR FIRST?

When you get that inkling that you are going to “make new what is now old”…..it is easy to start thinking what color should I paint my project?  You may have a large scale project like a car restoration or perhaps something smaller like outdoor furniture or a child’s Tonka truck. It’s fun to imagine how it will look when you finish your project. In order to make it a lasting thing of beauty, it’s important to use the right steps to get there. If you have rusty metal present on this project, it is important to take care to remove rust permanently to insure lasting results. When you go to the paint store or big box store, you will see rows and rows of paint products. Which one will help you with that rust removal? It’s overwhelming! Some paint products may have the word “rust or rusty” in their name. Don’t assume that it means it will take care of removing rust on that precious 1956 Chevy you are restoring.

Brazil's 56 Chevy

1956 Chevy restored using Rust Doctor products

How does a consumer pick the right product for their project? How do you remove rust? What about safety and environmental concerns? The Rust Doctor hopes to unravel some of these questions about the best way to attack rusting metal by introducing you to the various paint product to remove rust.

Rust Encapsulation

There are a few paints on the market that advertise the ability to seal or encapsulate rust. They claim to have chemical structures that have very tight molecules that will not allow moisture or oxygen to reach the rusted metal surface. The effectiveness of these products varies, depending on application and surface preparation. Because of the strong chemical nature of these products (toxic), gloves should be worn and adequate ventilation is important. Spraying requires special thinning solvents and specialized breathing equipment. In addition to being highly toxic, most rust paints are EXTREMELY FLAMMABLE and should be handled with caution.

respirators

Many solvent based rust removers require special safety equipment

Acids

Use of acids to dissolve rust is another method for rust control. A number of products on the market that deal with rust contain phosphoric acid. Acids dissolve the rust and leave behind a thin oxide coating on the surface. Because this coating is thin, it needs to be protected by topcoating with a quality exterior paint. When using acids, it is important rinse off the metal before the acid begins attacking the solid metal that remains after the rust is dissolved. Gloves should be worn and adequate ventilation is required when using acids. Because of the strong fumes associated with acids, spraying requires special breathing equipment and eye protection.

Another process similar to the acid removal process is commercial stripping. In this process, metal (even an entire car frame) is dipped in a large tank of caustic soda at an elevated temperature. After the paint is dissolved, the metal is removed and rinsed with water and then put in another tank of alkaline solution and the rust removed electrolytically. This is an effective process, but requires a topcoating within a few days or rust will start. Because of the cost of this type of operation, these facilities are usually only available in large metropolitan areas.

Chemical Conversion

A very old method of protecting metal from rusting is through chemical conversion. Blacksmiths were probably the first to discover this procedure when they coated their tools with oil and then heated them in a forge. This process created a very hard coating on the tool’s surface, protecting it from rust. Known later as “magnetite,” this very hard form of iron oxide is one of the most effective means of eliminating rust. And because magnetite is chemically inert, it does not react with oxygen or moisture.

Rust Doctor is a paint that uses the chemical conversion process. Two factors make Rust Doctor unique as a rust control system. The paint is a water based latex product, allowing brushes and spray equipment to be cleaned up with soap and water. In addition, because there are no strong acids or solvents in Rust Doctor, it is non-flammable and can be used in an enclosed environment without fear of dangerous fumes. This is especially useful when spraying Rust Doctor in a shop or garage. A second advantage of Rust Doctor is the fact it includes a clear primer that creates an excellent base for topcoating with any kind of paint. Once the conversion process is complete, the surface is left with a heavy coating of this latex primer. In one step, the rust is converted to magnetite and surface is primed. This primed surface will accept sanding primers, making it possible to create as smooth a surface as desired. You can also weld or use fillers if desired on a Rust Doctor treated surface.

Rust Doctor is non-toxic, non-flammable and biodegradable. Water clean-up makes it a breeze to use.

how to use 003

Be sure to visit our web site for a short video on how to use Rust Doctor. Get started on that rusty metal project you have been waiting to restore. The color? That’s up to you!

If you need help with your project or need technical assistance, contact us, the Rust Doctor Team is ready to assist you. Be sure to check out our other articles on this blog to see how easy it is to use Rust Doctor on your  rusty metal restoration projects.

BEFORE RUST

Before Rust Doctor and some elbow grease

AFTER

After…a nice project well done to last!

Rust Doctor comes in three convenient sizes for your use. Check out our product page to see what we offer to make rust removal easy for you.Rust Doctor and Grease Doctor is proudly made in the USA.

RD 3 sizes

 

 

 

Types of Rust Removal Options – You Decide

We love the challenges our customers take on when it comes to their car, home improvements, equipment and other projects. Many of them want to know if they can remove rust on a variety of metal items. There are lots of ways to approach and remove rust. What you have to evaluate is safety, ability, costs, reliability of the product or  system you are choosing. Here are several ways to remove rust. You be the judge of what will work for you to for rust removal.

Mechanical Removal
One of the most common methods to remove rust is by the use of grinders, wire brushes, sandpaper and sand blasting. These mechanical methods physically remove the rust from the metal surface. For minor rust, sandpaper will effectively remove rust. Heavy rust requires the use of power equipment that tears the rust away from the surface, exposing bare metal. Sandblasting forces large amounts of sand against the metal surface, breaking down the rust and some metal into fine particles that separate from the surface. Sand blasting is an effective process, but takes experience and specialized equipment. Additionally, if the metal is not primed immediately after sandblasting, rust will readily form on the porous metal surface. Using mechanical methods requires care because being too aggressive may damage the metal surface.

sandblasting

After sandblasting, you must prime the metal immediately to keep rust from forming on the porous metal.

 

 

 

 

 

 

 

 

 

Special Rust Paints
There are a few paints on the market that advertise the ability to seal or encapsulate rust. They have chemical structures that have very tight molecules that will not allow moisture or oxygen to reach the rusted metal surface. The effectiveness of these products varies, depending on application and surface preparation. Because of the strong chemical nature of these products (toxic), gloves should be worn and adequate ventilation is important. Spraying requires special thinning solvents and specialized breathing equipment. In addition to being highly toxic, most rust paints are EXTREMELY FLAMMABLE and should be handled with caution.

man-wearing-respirator

No special equipment needed with Rust Doctor

 

 

 

 

 

 

 

Acids
Use of acids to dissolve rust is another method for rust control. A number of products on the market that deal with rust contain phosphoric acid. Acids dissolve the rust and leave behind a thin oxide coating on the surface. Because this coating is thin, it needs to be protected by topcoating with a quality exterior paint. When using acids, it is important rinse off the metal before the acid begins attacking the solid metal that remains after the rust is dissolved. Gloves should be worn and adequate ventilation is required when using acids. Because of the strong fumes associated with acids, spraying requires special breathing equipment.

Another process similar to the acid removal process is commercial stripping. In this process, metal (even an entire car frame) is dipped in a large tank of caustic soda at an elevated temperature. After the paint is dissolved, the metal is removed and rinsed with water and then put in another tank of alkaline solution and the rust removed electrolytically. This is an effective process, but requires a topcoating within a few days or rust will start. Because of the cost of this type of operation, these facilities are usually only available in large metropolitan areas.

Chemical Conversion
A very old method of protecting metal from rusting is through chemical conversion. Blacksmiths were probably the first to discover this procedure when they coated their tools with oil and then heated them in a forge. This process created a very hard coating on the tool’s surface, protecting it from rust. Known later as “magnetite,” this very hard form of iron oxide is one of the most effective means of eliminating rust. And because magnetite is chemically inert, it does not react with oxygen or moisture.

rust-doctor-qt

 

Rust Doctor is a paint that uses the chemical conversion process. Two factors make Rust Doctor unique as a rust control system. The paint is a water based latex product, allowing brushes and spray equipment to be cleaned up with soap and water. In addition, because there are no strong acids or solvents in Rust Doctor, it is non-flammable and can be used in an enclosed environment without fear of dangerous fumes. This is especially useful when spraying Rust Doctor in a shop or garage. The ease of water clean-up makes using Rust Doctor a breeze AND it is biodegradable . Another advantage of Rust Doctor for rust removal is the fact it includes a primer that creates an excellent base for topcoating with any kind of paint. Once the conversion process is complete, the surface is left with a heavy coating of this latex primer. In one step, the rust is converted to magnetite and surface is primed. This primed surface will accept sanding primers, making it possible to create as smooth a surface as desired.

Today we have posted an interesting project of removing rust from a large heavy duty spring for a car. Rust Doctor comes in several sizes. Call us or email if you are not sure how much product you will need.

69 rusty spring

Ready for the rust removal job.

Rust Doctor applied

Spring converted &  completed

Rust removal is complete. Rust Doctor leaves a black coating with a clear primer. You can leave it black or paint it any color.

Rust Doctor Temperature Limitations

Here is a great question from a Rust Doctor customer. It’s easy to get caught up in the outside beauty of a project car’s “look”. This includes the paint, wheels chrome etc.  But Steve’s question about the Rust Doctor’s rust removal abilities “under the hood” or undercarriage speaks to the quality care he is giving his car. Using our products for rust removal is wise insurance for the longevity of his car. Thanks for the question Steve. If you have a question about rust removal, please contact the Rust Doctor.

Hello,

Will a cured application of Rust Doctor rust remover withstand the operating temperatures of the exhaust manifolds (stock) on a SB Chevy 327(stock)?

Thanks,

Steve

Hi Steve,

Rust Doctor will convert the rust on the exhaust manifold to a non-rusting black iron oxide that can withstand temperatures much higher than those found on an exhaust manifold. In fact you can weld on the converted rust.

Rust Doctor also leaves a clear primer on the surface that will accept any kind of paint. However, the clear primer will burn off anywhere the temperature is above 300 degrees which is much of the manifold. After the primer burns off, you can paint the manifold with a high temp paint which does not need a primer and can be painted over the converted rust. By the way, exhaust pipes and mufflers do not reach 300 degrees so the black iron oxide will have a slight sheen from the primer left on the surface.

The Rust Doctor Team

This job required a lot of rust removal with Rust Doctor. This was behind the grill on the 1969 Bonneville Pontiac.

This job required a lot of rust removal with Rust Doctor. This was behind the grill on the 1969 Bonneville Pontiac.

After application of RD

Here is an AFTER shot of the rust removal. We could hardly wait to get the grill back on the “Bonne”.

bonneville-039_lo


Here is a front shot of the finished grill after all the rust removal and new paint and polished up grill. This shot was taken at the Bonneville Salt Flats by Graham Lewis

 

Remember this…..

nontoxic

Non Toxic and Non Flammable!

 

There are no solvents or strong acids in Rust Doctor. This allows you to restore rusty surfaces without the fear of toxic fumes or potential skin irritation. Rust Doctor can be sprayed in an enclosed environment without the need for special breathing equipment. Clean-up after using Rust Doctor is easy and only requires washing brushes and spray equipment with soap and water. Rust Doctor is a one step process and does not require any chemical preparation of the rusty metal or rinsing after it is applied. Shelf life is two years and the container can be opened and closed as many times as necessary. And, unlike many other solvent-based rust paints, Rust Doctor is completely non-flammable! It is an ideal product for customers who are concerned about the risk of fire whether at home or at the workplace.

 

 

Repair Rust on a Heating Oil Tank

I’m wondering if the combo of Grease Doctor and a couple of coats of the Rust Doctor would be appropriate for my heating oil tank which is getting quite rusty on the lower half (the tank is located inside my basement). The tank will be hard to access on the back (wall) side. Might I be able to apply the product with a mini-roller (and long handle)?

Thanks,

Ian

Hi Ian,

Rust Doctor and Grease Doctor will work well for you in stopping the rust and protecting the tank from future rust. You will need to clean the tank with Grease Doctor and rinse with water. Remove and loose rust or paint on the surface the best you can. A good way to do this is to apply Grease Doctor to the surface then brush the surface with a wire brush or a Scotch Brite Pad (sold in paint stores). Rinse the surface with water. Grease, dirt, oil, loose paint and rust will all be washed off with the rinse water. If you don’t have a drain in the basement for the rinse water, use a bucket and towels to rinse the tank. You can apply Rust Doctor to the rusty metal by any method that will work for you, including putting it in a garden sprayer to reach into difficult areas. If some Rust Doctor runs onto the floor, just wipe it up with a wet rag. Because Rust Doctor and Grease Doctor are water based, you will not be dealing with strong fumes or toxic chemicals. If you have more questions or need technical help about rust removal, please contact us.

We have more “tips & tricks” on our web site that might be useful for your project. You can also check out our video on how to use Rust Doctor on your rusty metal.

The Rust Doctor Team

oil tank

Rusty metal can spell disaster for your oil heater tank. You can easily repair rust using our non-toxic, non-flammable and biodegradable products.

 

Non-toxic, non-flammable, biodegradable

Getting ready to attack rusty metal? Are you concerned about the safety of the products you use? We want to assure you that Rust Doctor products are non-flammable, non-toxic and bio-degradable. We get requests from contractors, painters, utility companies and other large businesses requesting a Material Safety Data Sheet – MSDS. These companies often require MSDS sheets to confirm the safe use of products and compatibility with other materials they may be using. We welcome your requests for MSDS information. Click on the link below for the Rust Doctor MSDS sheet. If you need any other information Contact the Rust Doctor . You can also check out the Rust Doctor’s technical page for more information.

Rust Doctor MSDS 6-2012 

www.rustdoctor.com

 

 

Here is a picture of a rusty metal tank that needed the Rust Doctor solution. Before they ordered the Rust Doctor they needed to be sure that Rust Doctor met their safety standards. We did!