I have a rather nice Besson Imperial Euphonium which I really enjoy. It has a glass bead blasted (satin) silver finish. I really would like to polish it, only I worry that using a silver polish would strip away the beautiful finish. The best one that I have found so far is an eraser...with isn't all that great, since I'm erasing the silver off my horn. A more extreme method involves a bathtub, some aluminum foil in warm water, and an electric current.
Im curious if anyone has come across a decent method for polishing without ruining satin silver. I would be very thankful if you could share your knowledge.