I can't take credit for this one - good old TV Ricks Restoration. What I am using is Blue Magic Metal Polish Cream. It works on all sorts of stuff. The reality is you can always sand down to 2000 grit and with enough different abrasives you can bring it to a mirror shine assuming you have enough metal. Just thought I'd share as it was new to me.
Gene, can you post some pictures of your results please?