How to Get Scratches Out of a Porcelain and Cast-Iron Sink

Cover superficial gray stainless steel scratches with a layer of cook top cleaner. Let the cleaner stand for 15 minutes. Buff the area with a sponge-backed pot scourer. Rinse well and dry with a paper towel.

Scrub the area surrounding deeper scratches with a strong household detergent and a stiff bristled brush. Wipe dry. Remove all traces of detergent by cleansing the area with denatured alcohol and a soft cloth.

Prepare the correct color paint from a porcelain repair kit. Follow the manufacturer's directions; some kits use an epoxy finish that needs to be mixed with a hardener, other kits come with a separate tint that must be mixed with a neutral base for color matching. Test the color on a paper plate before carrying out the repair

Use the finest artist's watercolor paintbrush you can find to apply progressive thin layers of paint to the scratch until you achieve the desired color match. Blend paint edges by dry brushing outwards toward the surrounding surface. Allow adequate drying time between each coat.