3M(TM) Imperial(TM) Compound and Finishing Material, 06045, Gallon, 4 per case This liquid compound and finishing material is designed to remove a P600 or P800 dual action sand scratch from gelcoat, with a wool pad. Designed to be used with an air or electric buffer (1500-2500 rpm) equipped with a 3M(TM) Compounding Buff Pads.