I'm working on a project for an engineering fraternity I'm part of where I'm building a barbecue out of a 55 gal drum. A requirement is that it has to be red, so I picked up some red BBQ paint (http://www.krylon.com/products/bbq_stove_paints/) for the high temp ratings (up to 1200 intermittently) so that it (hopefully) wouldn't burn off. I have everything all painted up and I just realized tonight that even though its sat for a week, I can scratch the paint off down to bare metal with just my fingernail. What gives? If I can take it off with my nail, this thing has no hope of retaining any paint during normal use (it goes camping, to social events, official events, you name it). I've always had this problem from Krylon paints and is why I normally use Rustoleum, but I needed paint that withstands high temperatures. I thought about a Rustoleum matte clear coat to put on top, but I figure that would yellow from the heat. Is there anything I can do to make the paint stick, or at least be a little more durable?