Where to get brass plating done?

[caneman]

Anybody know a place where it can be done reasonably? We have a large wall hanging Caboose Lamp which after 25 - 30 years of cleaning is showing wear on the plating. It's brass plating on steel and some steel is showing and rusts a little. The reflector part is probably 20" in diameter.

 

[caneman]

Looks like this might be one of those unproductive posts.