Frequently Asked Questions
Q: When painted metal has been outside 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.