Living Finish
Patina Changes Are Usually Temporary
To prevent discolouration or damage to the finish, avoid acidic substances left in contact with the copper surface. For example, when cutting acidic fruits let the water run so the fruit juices do not linger on the copper and thoroughly rinse the sink.
These substances may remove the patina finish of a copper sink. However, if an acidic product removes some of the patina, do not worry. The patina will naturally return over time, generally in a matter of days, and will once again match the surrounding area. During this period of re-patina, avoid waxing the sink.
Copper has an endless ability to regenerate the patina surface naturally. With regular use, the finish gradually returns and blends back into the adjacent area.