i'm just about to embark on pulling all the carpet (yes, carpet) that the p.o. put in the interior of my 40. there is considerable surface (i hope) rust on the rear floor pan. i'm planning on wire brushing the shit out of it and applying a rust sealing paint on it, then doing a hurculiner or similar job on it. read great things about POR-15, but heard some good stuff from a friend about hammerite. do you guys have any oppinions about either or both? i believe that i can obtain hammerite locally, would have to get por shipped in. also, the price for hammerite (i believe ) is much less than the por. any top coat issues with them??