Without damages, this clay bar removes unwanted residue such as iron powder, pitch, tar, bird droppings or dead bugs which cause low gloss and dull on the car. It makes more effective to be used before waxing or coating. Direction 1. Wash the car to remove sand or dust. 2. Rub lightly on the car surface, wetting the area being cleaned. 3. If surface of the clay cleaner gets dirty, refold it and continue to use a clean surface as needed.