Not sure if we're talking about the same type of coating. FWIW, SwainTech description of Poly Moly™ - ... has an extremely low coefficient of friction, reduces scuffing caused by piston movement and provides back-up lubrication if your primary lubrication fails or has gone beyond its load limits. Unlike the simple “break in” skirt coatings that are now being offered by piston manufacturers and OEM’s, Poly Moly™ is designed to be a permanent solid film lubricant coating.