On construction sites, sinks are sometimes used to discard liquid waste containing foreign contaminants, including very small metal particles. These particles can embed themselves in the grain of the stainless steel, leading to potential rust-related issues when the sink is eventually used by the owner. This can be easily rectified by following either of these care instructions: 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.