Clay bars, blocks and mitts are used in conjunction with a luber to remove contaminants from your paint. We know what you're thinking...my paint doesn't have contaminants in it, it looks fine. Rub your hand over your paint. If it doesn't feel as smooth as glass, then you do need to clay your car. Not sure about clay bars -
start here. Want to learn more about claying your car? Visit the Chemical Guys YouTube Channel here.