How to Remove Verdigris from Copper Sinks 27. October 2015 CSO-Author How-To Guides and Tips copper maintenance, copper patina (0) Tweet Watch the short video below to see us removing slight verdigris from a copper kitchen sink at the main office of CopperSinksOnline.com! Today we noticed some minor verdigris had developed on the rim of our standard copper kitchen sink, and wanted to show how easy it is to clean up! All we did was to get a wet paper towel and wipe off the greenish blue spots. Verdigris, most recognizable on the Statue of Liberty, is the result of copper carbonates forming on the surface of copper, many times from seawater or salt air. Most copper that is kept indoors will not develop verdigris, but if you live near the ocean and your copper sink is installed in an area that gets exposed to the salt air, you may see verdigris develop. Although our office is located on Whidbey Island, north of Seattle, Washington, we suspect that the verdigris on our copper sink likely developed as a result of some salty food being spilled on the sink's rim and left overnight. In the video, you'll notice some shiny spots on the rim of our copper sink that exist before we wipe away the verdigris. Full disclosure: We are very hard on our copper kitchen sink here at the office! We're constantly dripping acidic foods and liquids on the copper to test its reaction to certain solutions so that we can provide knowledgeable customer service on copper sink maintenance when you call in! Those shiny spots are not a result of wiping away the verdigris. If they're fresh, the green verdigris spots can easily be removed with a wet paper towel, without removing any dark patina. If you choose to use store bought copper cleaner, vinegar, or lemon juice, you will risk removing the dark patina that has developed or been created by our artisans. Keep in mind that by removing the patina you are restoring the metal back to its original tone, which is like a bright shiny new penny. Shiny spots will develop a new dark patina over time and eventually blend in with the rest of the sink color.Your copper sink has a "living" patina finish that will lighten and darken over time, depending on the use. If you get a shiny spot or a patch of verdigris, don't fret! We have lots more Copper Care and Maintenance tips for you, and we are available Monday - Friday from 7am-4pm to answer questions about your CopperSinksOnline.com products! Please share this post & video with anyone who has a copper sink!