I have 3 different glossy sunburst basses, and they all have some scuffing, not enough to break or crack the finish on any of them but the scuff is large enough to bother me on two of them, the other is going up for sale and I would like to make it look purdy. I will say first and foremost, I have no body work/paint experience so this is an experiment for me, any beginner tips you have are greatly appreciated. First I have a 2010-1 Squier VM fretless jazz, the body is polyurethane, this one I am positive of. Second I have a 2004 Fender Standard Precision bass (MIM), Fender doesn't list the specs on their site, I am guessing it is polyurethane, I don't know. Third I have a pre-2007 Jaco Pastorius artist bass, I believe it is a nitrocellulose lacquer, it came with a little pamphlet about lacquer finish and crazing, I could be wrong though. So I am wondering what works best to bring these back to their old shine. I have been told turtle wax and a chamois works great, but I heard that for poly finish, will it work for the nitro as well or will it damage it? The last thing I want to do is damage any of these worse. Anything you guys have used that works better? Thanks in advance for any assistance.