Ever use carb cleaner on your nipples?

NO! not those nipples.... these;

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on a black powder rifle? It worked great!!!

If you don't clean the residue off at the end of the season the entire gun corrodes really fast. Most Civil War re-enactors tell me to just let it "brown up". I guess the Brown Bess was brown for a reason. but that's rust ya'll and I just have a problem with that. Yes I use an 1857 replica for deer hunting kinda weird I know. The state where I started to hunt a smoke pole regulated how it was loaded and only iron sites and I thought these were cool anyway. That was in the mid 90's and the barrel is still shinier than my Barracuda bumpers!
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I've never worried about the deer being scare off by it, they only ever see a big dark hole!

Anyway, can anyone think of a reason why one shouldn't use carb or break cleaner on the metal bits? thanks in advance.