Surface tarnish on a stainless steel sink can be effectively removed using various methods: Stainless steel cleaner: Use a stainless steel cleaner to restore the sink’s shine. Bi-Carbonate of Soda and Vinegar paste: Create a thin paste by mixing bi-carbonate of soda and vinegar, then apply and scrub the sink to eliminate tarnish. 10% dilution of Nitric Acid: Dilute nitric acid by 10% and use it cautiously to clean the sink. Exercise care and follow safety guidelines when using this method.