In this video I demonstrate how to use a clay bar to prepare the paint surface, before the final polish is applied. The purpose of the clay bar is to remove things like paint overspray, plant pollen, air born ferris metal, and other contaminates that may rest on the paint surface. In this case I lightly buffed the car to remove any lite scratches and then applied paint sealant. See more Detail tips on my Blog @ Nu-Sheen-Blog.com