GP25022 Professional Glass Scratch Repair GP-WIZ System, Removes Scratches, Surface Marks, Water Damage, Acid Etching, Grinder and Welder Splatter Damage Compact Version of GP-WIZ System, used and approved by GLASS POLISH technicians worldwide. Kit comes with 4.5 inch components and its ideal for large area repair. Designed to be used with an angle polisher 5/8''-11 thread at Recommended speed of 2000PM Removes scratches, graffiti scratches, grinder and welder splatter damage, scuffs, hard water deposi Can be used on any type of glass surface including toughened glass and any automotive glass.