Dark Soy Sauce..... yup,, just soak your tarnished copper for awhile, then I use a toothbrush and good old Dawn liquid.. Linda
It's the salt and vinegar in soy sauce that cleans copper. I uselemon juice, vinegar or hydrochloric acid and salt. It's especiallygood for cleaning my copper kitchen scales and pots.
Tony KonrathGold and Stonehttp://www.goldandstone.com