Hey all, I got a question regarding raw brass. I had posted pictures of my newly refurbished trumpet. I had the bell in raw brass and everything else silver. My question is this: If I just don't polish the bell will it just eventually turn to the patina color? I've seen some monette trumpets (raw brass) and I really like the look of them. Mine was getting some spots on it and it made me nervous so I polished it, but if I just let it go and do nothing with it, will it just eventually turn the finish I want or do I need to do something with it?