Ospho????

I'm working on the front and rear extension pieces right now to try to get good appearance with my process. I used rustoleum rattle can AUTO primer and topcoat, it was not compatible with my other stuff. See, I sanded it down with 500 grit, then applied a Wanda brand single component paint, well it ended up working like a top grade paint stripper......... Took the paint off in a few spots down to bare metal...... Back to the drawing board. Thing is I did not use Ospho on those parts cause its plastic and pot metal. So compatibility is a big thing to watch out for.