This is the foundation of the Ultimate Wax System,® preparing your paint for Sealer & Glaze and Pure Carnauba Wax. Pre-Wax Cleaner removes oxidation, old wax buildup and other contaminants, cleaning and shining your paint. This mild polish smoothes the edges of larger imperfections and removes small scratches. Your paint’s appearance is dependent on a good polishing—Mothers® Pre-Wax Cleaner should be used at least once or twice per year.