I have seen things like "brasso" leave a halo around the brass parts. I'm not certain what it does to the finish to cause this, but I stay away from anything not associated with the time period in which the piece was made. I use the same philosophy in the restoration of stringed instruments, re glues,finishes etc. For cleaning, I have used a cloth dampened with alcohol to lightly go over a violin finish. Once over only, and then let it rest for a day. The instrument was filthy, and it took a month to get most of the grime off, but I didn't do any damage to the original finish. So many of the instruments I have had through my shop have been forever damaged through someones compulsive instinct to "clean" them!
Or "polish" them. I am not saying , leave it filthy..just be carefull and know what you are doing. You could be "cleaning" off thousands of dollars. Sorry if I sound preachy! I've just seen too many nice pieces ruined.