3M between coats finishing pads are used to prepare surfaces before applying the first coat of finish or sealer and again between coats to obtain a super-smooth finish. Use finishing pads to prepare surfaces before applying the first coat of finish or sealer and again between coats to obtain a smooth, professional finish. These pads help remove bubbles, dust nibs and other minor blemishes that may appear during the final finishing stage. If pads get clogged, simply rinse and reuse. The synthetic material does not rust, splinter or shred like steel wool.