Krylon is very heat resistant. It didnt even bubble on the gas block on my 858, even in winter when the steel goes from minus 20 to several hundred degress and back down again within a matter of minutes. It is however a piss poor finish for steel, even with sandblasting, cleaning with wax and grease remover, heating to evaporate the solvent, priming, painting and curing for a week it still chipped like a bastard. Its more chip resistant before it cures, afterwards it get pretty brittle. I re-blasted, prepped and primed with VHT primer then painted with their flat black silica/ceramic header paint. I dont have an oven to bake it but it was far more durable than krylon for about $15/can. I painted the heatshield on my old tri-z with it so it got baked on and it was incredibly tough afterwards. It sat right behind the front tire getting blasted with dirt, gravel, snow, ice, mud etc and didnt have 1 chip or rust spot after over a year. I tried scraping it with the sharp edge of an old bearing race and barely left a mark that wiped away with my finger. If you can bake it on, its great stuff and probably compares to some of the higher end gun finishes.
