Baking the powder paint is the key, I have made jigs for years and I hate to say there is NO PAINT that will last in rocks even factory made ones won't for long, although I have found that the epoxy paint from LureCraft is very tough with 2 coats and not to costly, good people there too, Shawn will mix any color you want, word of advise keep the hardener in the frig inbetween uses............Good Luck
