Design Bronze

How can I paint my chess pieces? They are bronze, I think. I want to follow the subtleties of design.?
Series consists of bronze coins and silver coins. It's a bit difficult to differentiate the two. The silver is bright and pleasant, but the bronze is an opaque color is not appealing. I would like to bronze paint, but this is a chess game of the estate, so do not want to paint the pieces to hide the original details of the chess pieces. Thanks !!!!! In fact, I tried before polishing with a metal cleaner. These silver clean well enough, but the bronze is still not as bright as I like.
Get some metal polish Brasso. It will restore the luster. Please do not paint the bronze chess pieces that decreases the value, if you have calculated for insurance purposes.