The whole patina thing kills me. I personally only buy brown guns, if it's cleaned, and it's lost all that history, then I'm not interested. Collectors here will say never clean. But look at all sorts of dealers website, and you see armoury bright muskets. They are said to be untouched , never cleaned, hardly used. Or did someone just clean the dang thing! Either way they can go for more money than untouched and uncleaned. It seems to fly in the face of what collectors say, or do collectors really mean what they say? I guess you are free to collect what you want.
Sorry , don't mean to rant or hijack the thread. Very neat carbine btw.