Rust Converter Recommendations. Aerosol for sun faded/surface rust car.

barbee6043 said
I agree but be careful coming back with an epoxy primer that an react to the acid. Call Southern Polyrethanes and they will tell you that a reaction can occur with their epoxy primer. They recommend if using the phosphoric acid sol. (Ospho), then wet it all down good again with the Ospho and follow right up with a water bath to neutralize the acid.
I am no chemist but I have also been told in other places, the the reaction might occur of the epoxy prime contains any acid. I really have NO idea if any epoxys contain any acid!!!
I had a rusty hood a few years ago, I hit it with a DA 80 grit, came back over it with a big wire cup on the right angle grinder, there was pitts (rust) in the metal. I wiped it down good with Ospho. DID I let it dry overnight???? Don't remember. I coated it real good with Plain ole Rusteolum , the real stuff in the Gal can. After it finally cured, there ere some places the R. enamel sorta wrinkled. It sat outside for months, the R. kinda faded as usual, but it all was stuck on there like ugly on an ape. Point is, there was some reaction between the Ospho and the R. in a few places, and it all was darn near impossible to sand off when I later tried. Interesting experiment.

This is what happens to a nice paint job, when and it will, rust comes back. I’m my case the acid in the epoxy primer was incompatible with the rust killer. I used all body shop supplies from our AkzoNobel supplier. I’ll never use it again on a body panel. I would use it on other surfaces.