Hi Art, Many months ago you hooked me up with my 1923 22B. I have not polished it or done anything to the raw brass and copper finish other than an occasional wash in warm soapy water. I did free up the third slide, not frozen just tight,and the frozen valve spring tension adjusters. I had new corks and felts installed and some minor dings removed. I have added the period correct Conn case and accessories. The raw brass has not changed in color at all as far as I can tell. And I have had no problem at all with any reaction to the lack of lacquer. It is a great horn! I don't like the idea of stripping a horn of its laquer unless it is beyond hope and no longer protecting the brass, but I would not be too concerned about buying another horn that was raw brass. If anyone has a raw brass Committee or Recording they are having adverse reactions to I would be glad to releave you of your problem horn. I would even pay shipping.