I know it probably makes no difference but it can't hurt to ask anyway... Is there a 'best' spray paint for marking an AR500 steel gong? It will be mostly for .308 & 300WM between 4-600 yards, and maybe a 50 bmg (ball ammo) now and then. I'm looking for something that will take a decent amount of hits before I have to go downrange & repaint. Would engine block/ high temp work better than Krylon or is it just wishful thinking?