Proper surface preparation is one of the most important factors in achieving a quality finish. This specially formulated PRE Painting Prep removes dirt, wax, polish, grease, silicone, buffing compound, even road tar - ensuring a clean surface. Very easy to use: just spray it on and wipe it off. Works better than lacquer thinner, which can leave a thin residue on the surface and possibly interfere with paint adhesion. Buy 3 or more and SAVE!