Aluminum will not tarnish, brass and copper will develop a patina over time. Some people experience "greening" where the skin underneath the metal turns green. This is a totally normal reaction with raw copper and non-toxic. Many of our customers use the greening as a kind of reminder to drink more water as the acidity of your skin is related to your hydration. Avoid exposure to water. To polish you can use a jewelry cloth. You can also use a small amount of ketchup to remove the patina, simply rinse, wipe clean and dry thoroughly.
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