Optimum (OCLAY-YEL Opti-Clay Easiest, fastest, and the most effective conventional way to remove surface contaminants such as rail dust, brake dust, industrial fall out, tree sap, bug residue and paint overspray If the paint feels gritty after washing you can use Optimum Opti-Clay to restore the surfaces to a clean and smooth finish Can also be used to decontaminate other automotive surfaces including glass, frills, wheels, plastic lenses, etc. Use Optimum Opti-Clay before waxing or sealing to safely remove bonded surface contamination