3M - Perfect-It EX AC Rubbing Compound - 1 Gallon - 36061. 3M Perfect-It EX AC Rubbing Compound is our best-performing rubbing compound for removing P1200+ sand scratches and surface defects before polishing, even on the latest clear coats. It is formulated to perform in all conditions, including high heat and humidity, without sticking to panels or leaving film residue. It delivers a longer working time, yet still reduces sling for easier cleanup.. Features:. Size - 1 Gallon. 3M's best-performi