If there's no protective laquer coating over the brass, and if the receiver is in fact brass, then any metal polish like Brasso or Noxon will work. I don't know about Uberti, but Henry's Golden Boy is NOT made from brass - you better check that first. BTW, that's Uberti, not Iberti. Cimmaron should be able to advise you.
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Last edited by RL357Mag; 05-18-2009 at 01:49 AM.