Lacquered brass or copper require periodic polishing and re-lacquering

Brass and copper are versatile metals. They are found in a variety of finishes, with differing applications for interior and exterior decor. Some people prefer the look of aged metals and the rich patina or verdigris that develops over time, a maturing that occurs with both natural and polished brass or copper when not lacquered. 

However, others want metal furniture that glows with a mirror shine, and that requires either lacquering or a lot of hard work. While lacquered brass or copper will keep a shine for many years, the lacquer coating will eventually wear out. Fresh lacquer should be applied about every 10-25 years, depending on the material's exposure to sunlight, moisture, and wear. If you see lacquered polished metal beginning to show spots, a coating needs to be reapplied.