3M SUPER DUTY RUBBING COMPOUND - Super Duty Rubbing Compound is recommended for heavy aggressive compounding of oxidized gelcoat and marine paint. Clings to paint surface and remains wet on the job with little or no mess. Maintains high rate of cut with constant pressure. Buffs to high gloss with minimum of swirl marks. Can be used by hand or by machine. Product is sold by the pint, quart or gallon.