Prep-All™ is an effective, fast acting wax and grease remover for many automotive surfaces. It should be used prior to sanding to prolong the life of sandpaper and again after sanding as a clean-up agent prior to applying top coats. Prep-All™removes old wax build-up before re-application of new wax to promote an even, mirror-like finish. It is also great for removing silicone and road film.