This product - like many stained glass products - contains lead and hand washing after handling is recommended. This product is intended for hanging indoors, and may become oxidized or show other signs of wear if exposed to the elements. **Please keep away from food and out of reach of children** Copper patina is not true copper, and cannot be polished like copper. Copper patina will naturally deepen to an antique finish over time - this is a feature of the patina and one of the traits that will lend beauty and character and should not be taken as a blemish.