Scuff Magic Prep Soap scuffs and cleans in one application to prepare bumpers and panels for repair, refinishing, or blending. The pumice in scuff magic is very aggressive and helps to cut through grime, bugs, and crud. The soap is also very powerful and helps to lift and emulsify contaminants that can ruin your repair. Because the soap is so powerful, you might want to wear some gloves when using this product.