Before you apply another coat of wax onto your vehicle, consider how well youve prepared the surface. Was the paint cleaned first? Our Pre-Wax Cleaner is formulated to clear the oxidation, embedded dirt, road salts, tar, airborne chemical pollutants, stains, old wax and other surface contaminants that may have built up. Pre-Wax Cleaner polishes out minor flaws and smoothes the paint surface. Clean twice a year or as needed with Mothers Pre-Wax Cleanerbe prepared for Phase 2 and Phase 3. This is a 16 ounce bottle.