Discussion about the Korg PolySix synthesizer

Along with my PolySix I have a few Rolands with metal panels that 
despite my best efforts I can't get the fingerprints off.  What's the 
best way to clean those metal panels and not strip the paint off at 
the same time.

And, relatedly, I just got a Juno 106 that has tape residue on the 
panels.  I can get it off with my old methods (saturating with 
diluted household cleaner and then some gentle scrubbing) but I 
noticed when I was doing this to my JX3P a little of the paint came 
up with it.  Fortunately the paint that came up was minimal and 
didn't affect the look of the panel, but of course I stopped doing 
that to prevent it from becoming an issue.

Thanks!