| Re: It's almost like getting a new horn!
I think the green stuff is organic with a copper oxide. I think brass has copper in it and the oxide leaches out. Let me check......sure enough there is a lot of copper in brass.
(Most of the brass in your American made horns is made at the "tube mill" in Alton, Illinois which is Olin Brass Company. They also make bullet brass and shotgun shells (for 40cal). At one time they spun bells for instrument manufacturers from tube.)
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