This is the foundation of the Ultimate Wax System, preparing your paint for Sealer and Glaze and Pure Carnauba Wax. Pre-Wax Cleaner removes oxidized paint, old wax buildup and other contaminants, cleaning and shining your paint. This mild polish smooths the edges of larger imperfections and removes small scratches. Your paint's appearance depends on a good polishing--MOTHERS Pre-Wax Cleaner should be used at least once a year.