Be careful in cleaning "oil rubbed bronze". It is a "live" finish and more like a paint than a metal finish on most fixtures. I don't think I would use normal metal polishes on it since it is more of a flat finish and is not very thick.
We just rinse ours of and dry them when they get water spots. Spots have not been a serious problem so far but I notice that the finish differs, depending on the company of mfg. If you are haveing problems, I would suggest contacting the supplier before taking any kind of 3rd party polish to oil rubbed bronze finishes.
Yikes...I did not know that. Thanks for the warning. Maybe I will e-mail the mfg. of my fixtures and see what they recommend. I hope, in the meantime, I didn't ruin the finish.