Tree sap, road tar, bug splatter, and pollution can stuck underneath your car's clear coat paint, glass and metal. These acid debris will damage your car's paint overtime if not taking good care of it. After wash your car, place your hand in a plastic shopping bag and lightly run your hand over the surface of your car. If you don't feel it as smooth as glass, the chances are your car need to be clay. Traditional clay bar usually comes in large pieces (280 - 300g). Golden State's clay bar has pre-cut into 4 small pieces so you don't have to cut it before use. Simply unwrap a small piece and start to clay. Even by accident you drop a piece on the ground, you waste one small piece, not a whole bar. Clay a 12" x 12" section each time before move on to the next section. Use our microfiber towels to wipe off lubricant. Give your vehicle its showroom shine.