A granite composite sink provides a touch of class that ceramic just can't offer. However, scratches in these sinks can ruin their look, not to mention inviting further damage if they're not attended to as soon as possible. To remove scratches from a composite sink, simply apply some common household products to the surface of the sink. You won't need any special equipment to get your composite sink looking like new again.
Apply a drop of dishwashing liquid to a water-moistened soft cloth. Wipe the scratch and the surrounding area with the cloth. Dry the scratch and the surrounding area with a cloth.
Pour white vinegar in a glass bowl. Moisten a paper towel in the bowl. Place the moistened paper towel on the scratch. Remove the paper towel after 20 minutes have passed. Dry the scratch and the surrounding area with a soft, dry cloth thoroughly.
Apply a line of low-abrasive cleaner along the length of the scratch. Place a clean edge of a soft cloth at the beginning of the scratch on one side. Press down on the cloth as you move it across the scratch. Remove the cloth once you reach the end of the scratch. Repeat this procedure an additional four times.
Wipe the area where the scratch was located with a water-moistened soft cloth. Dry the area with a soft, dry cloth thoroughly.