I've been working with mil-surplus primers, 2 gallon kits of two-part polyamide epoxy primer for $50/ea..the guy was from TX and had pics in his ebay listing of pallets of it for sale..I bought two (2)gallon kits and didnt use it for a few months,no big deal but man the stuff really is nice..green and yellow colors but it is primer..cures rock hard,I go back over it with 400grit then top coat..really makes for a nice foundation under a paint coating..I just did the steel roof on the golf cart I have,what a rusty mess,but after grinding it clean I laid two coats of the epoxy on it, man does it have some high build,but wear a respirator,this is the good stuff....I then top coated with Dupont 2-part Centari acrylic enamel..turned out nice. I love to paint. GM had a lot of problems years ago with primer and paint compatibility..Man that van roof has a lot of surface area Jim..and probably gonna be hard to reach out over it to paint as well..maybe tape the paint gun to a long pipe or tube?
