Well i just tore down my 3 year old block which had srp 8.5 comp pistons with the crowns ceramic coated by Swain coatings and the skirts coated w/ there poly moly dry lubricant(black coating) well it pretty much wore off there was some left. Well i hope this answers alot of questions for people wondering how the stuff holds up. I would probably recomend it only for trailer queens but for daily driving it won't last.