The polished brass mustache starts shiny and develops a rich, natural patina over time. Each piece is hand sculpted in our Soho studio then sand cast in brass and hand polished. Like a fine wine or a baseball glove, our brass objects get better with age. The polished brass starts shiny and develops a rich, natural patina over time. If you wish to buff fingerprints or scratches from the surface, use a dollop of brass polish and a microfiber cloth. P.S. If you have no patience for patina, you can drop it in a bucket of acetone but at your own risk.