Some of our products are made from unfinished Brass, Bronze & Copper. These are natural finishes that are not protected with any type of external finish or coating.   Living finishes will age with time and use which means they will oxidize and develop a patina and the initial finish will change. The finish will dull, deepen and darken. It can also appear irregular.  Either let them age with grace, or polish them with a clean, soft, damp cloth regularly. Refer to our Care and Maintenance Guide for further information.