If automobile paint does not feel smooth as glass, even after a car wash, it needs to be decontaminated with a clay bar. Clay bars removes embedded surface contamination like pollution, brake dust, industrial fallout, tree sap, road tar, light water spots, and other deeply-embedded debris on any exterior paintwork, polished metal, glass, or clear optical plastic. A clay bar is easy to use: wash the car, then lubricate the area with Chemical Guys Clay Luber and scrub with a clay bar until it feels smooth. Also try the ergonomic Clay Block, or easy to use Clay Eraser Mitts. Want to learn more ? Visit the Chemical Guys YouTube Channel here.