- 1). Rinse the soapstone sink with water. Squirt dish soap onto a damp sponge and wipe down the sink to remove dirt and stains. Rinse the sink thoroughly with plain water.
- 2). Wet a piece of 180-grit sandpaper if a soapstone sink scratch or chip is deep. Rub the scratch or chip, first sand across the scratch and then follow the line of the scratch when sanding.
- 3). Run water over a sheet of 320-grit sandpaper. Sand chips smooth. Rub the sandpaper in the direction of the scratch until the soapstone scratch is no longer visible. If you removed a deeper scratch with 180-grit sandpaper, rub the sanded area with wet 320-grit sandpaper.
- 4). Wet a piece of 600-grit sandpaper and sand the area a third and final time to blend the sanding in with the surface of the soapstone sink. Allow the sink to dry completely.
- 5). Dip the corner of a clean, cotton rag into food-grade mineral oil. Rub the mineral oil into the soapstone surface to create a protective coating. Reapply food-grade mineral oil every four to six weeks to maintain the protective coating.
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