Our bronze sinks have a living finish that evolves over time. Current we can provide 3 colors for you choose: "Aged patina", "Blackened patina" and "Golden Bronse patina". Prior to shipping, each sink receives a coat of beeswax containing carnuba. This gives our sinks a rich, natural luster and slows the natural oxidation process.A maintenance coat of any carnauba-based paste wax, BeesWax may be applied periodically to maintain this finish.