I have heard answers to many of your questions..

But I don't really recall the answers.. I know there's a way to determine between copper/brass.. I think brass is non-magnetic while copper is supposed to repel magnets - like another magnet - pushes it away.. not sure how accurate that sort of test would be, tho..

I think you can clean either by soaking it in Coca Cola for a while.. I've seen a whole lot of ways to clean either: Mix together 1/2 cup of vinegar, a teaspoon of salt, and a sprinkling of flour until it forms a paste. Spread the mixture on the brass and allow it to sit for a few minutes. Rinse with cool water and dry.. Lemon, possible ketchup.. you might look that up - there is no shortage of ways to clean it.. I probably would try Coke first, tho.. I've seen drummers clean cymbals with Coke.. Jimmy, you ever do that?

I'd love to dive some WWII battle grounds in the Pacific.. Truk Lagoon is at the top of that list..

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Friendship is like peeing your pants.. Everybody can see it, but only you can feel the warmth..