How can a copper sink be damaged?
The actual copper in a vessel sink or hammered copper sink can’t be damaged through normal use or by most cleansers. What can be damaged is the patina or lacquer finish on the sink. Harsh cleansers, rough scrubbing-sponges and stiff-bristle brushes can damage the finish on your copper bathroom sink. So, never use brass polish on a copper sink that has a finish. Also, try to run water in a copper sink continuously when working with lemons, pineapple, mustard and other acidic foods, which can wear at the finish.
