Purpose of Polishing
The purpose of polishing is to remove contamination, swirls, scratches and other imperfections from the paint. In contrast to the clay, which removes contamination from the surface of the paint, polishes penetrate the clearcoat or the paint itself on single stage paint. Polishes are classified based on how abrasive they are. Rubbing Compound will remove the heavy scratches and oxidation. It can be compared to a fine sandpaper. Polish is used to remove light oxidation and fine scratches. It can also be used to remove light imperfections such as swirl marks or water spots. Pre-wax cleaner is also a polish. It is used prior to waxing to remove very light contamination and dirt. Glaze is the finest polish. It does not remove the imperfections but has the power to enhance surface gloss. There are other products such as a "buff and wax" which contain a high level of cleaner and U.V. protectant or carnuba, producing a polish and a protect effect.