3M IMPERIAL COMPOUND AND FINISHING MATERIAL - 3M Imperial Compound and Finishing Material has a fast cut and leaves an excellent finish without swirl marks. This liquid compound and finishing material is designed to remove a P600 or P800 dual action sand scratch from gel-coat, with a wool pad. Designed to be used with an air or electric buffer (1500-2500 RPM) equipped with 3M Compounding Buff Pads. Product is sold by the quart, gallon or 5 gallon pail.