Meguiar's Smooth Surface Clay Kit Make your wax protection last longer by removing bonded surface contaminants and restoring a smooth as glass finish with Meguiar's Smooth Surface Clay Kit. After you wash and dry your car, rub your fingertips across the top surfaces. Don't be surprised if what you feel is rough and bumpy. If the paint does feel rough, what you feel is the presence of harmful environmental contaminants such as over spray, fallout, brake dust, tree sap and more that have bonded to your paint finish. No amount of car waxing will remove these contaminants. Applying car wax on top of bonded contaminants takes more effort, and bonded contaminants prevent a freshly waxed surface from reflecting light and shining to its full potential. Bonded contaminants also inhibit the adhesion of car wax. Removing above surface bonded contaminants and restoring a smooth surface to your paint finish is easily accomplished by using Meguiar's Smooth Surface Clay Kit.This non abrasive clay bar safely, easily, and instantly removes bonded contaminants as you rub it across the surface of your car using a mist & wipe product, like Meguiar's Quik Detailer, as lubricant. The Smooth Surface Clay Kit provides the best performance and excellent value with 180g of clay, a full sized Quik Detailer and a Supreme Shine Microfiber Towel in every kit. Claying is the quickest and easiest way to guarantee the long term integrity and appearance of your paint finish.