Microstar 6" 15-Hole Film Backed Vacuum Grip Disc 2500 Grit - The Microstar FM Series film-backed abrasives discs are designed for mattening and paint rectification of clearcoat and gelcoat finishing. Microstar has a special stearate layer and a smooth film backing. This product has a high quality finish and lasts longer as it doesn't clog as easily as traditional products.