MEGUIAR'S® G191700 Smooth Surface Clay Kit is the complete solution to help prepare your paint and glass for paint correction with compound or polish, or to clean and prepare for wax, sealants or coatings for maximum gloss and durability. Clay bars work by gliding on the surface in combination with the included Quik Detailer lubricating spray, allowing it to safely remove bonded contaminants that make the surface appear dirty even after a wash. This kit will safely remove paint overspray, industrial fallout, iron contamination, light tree sap, or other environmental contaminants that do not easily remove from a wash alone.