I've gone thru the archives and there seems to be a lot of conflicting opinions. I started working on my 56 210 the other day, pulled out the interior and the rust situation varies between a few areas of the floor pans needing replacement to arees of no rust to a light haze of rust.
Very little of it is bad enough to need sandblasting, so I was planning on a combination of DA sander and wire brushing these areas. The question I have is: would using phosphoric acid be a good or bad idea? I was going to paint all of the underseat/behind door panel areas with Rustolium primer and then flat black Rustoleium afterwards. Would an epoxy primer be better or would it not matter. TIA