craig49, I just had two fenders blasted off my 52 panel and the guy told me he shot a coat of "rust stop" (probably his words and not a brand) on the fenders and they could be painted over. If it can be painted over I wonder, like you, wonder is stuff shot with a rust preventer can be coated over. Is there such a thing as "rust stop" by brand name? I wonder. At least the fenders have not even attempted to rust as of now and its been 4 weeks.