The Optimum Opti-Clay bar will help you remove stubborn contamination from your paint with ease! Opti-Clay makes quick work of embedded rail dust, brake dust, tree sap, bug residue, paint overspray, and more. Simply spray your favorite clay lube (i.e.Optimum No Rinse Wash and Shine ,ONR, NanoSkin Glide, etc.) to one panel of your car and gently glide the clay bar over the surface to remove the embedded contamination. Once this contamination is removed you will be amazed with the smooth and clean surface you are left with. Use this clay on all hard exterior surfaces (i.e. paint, wheels, glass, chrome, etc.) and leave these surfaces clean and ready to be polished, or protected with a wax, sealant, or coating. When you are not using the clay bar store it in an air tight container or zip lock bag to prolong it's life and protect it from contamination in the air. If you are looking for a great mild or light clay bar to properly prep your paint pick up the Optimum Opti-Clay Clay Bar!