I would take that apart, sand it with 600 grit, then 1000, then 1500 then 2000 grit. Then use a dremel with a polishing pad and some polishing compound, and make that look like pure gold. The reflection will be like a mirror. Every time you sand the brass with a higher grit of paper, change directions. Brass can polish to a gold colored mirror, try it you'll be amazed