What is the best cleaning method for these? I want to clean up the chrome and plastic on a 931 first edition I just got. It is 100% complete except for two replacement antennas so I would like to keep this for myself. It is beautiful, the only thing is is that I’m worried about over cleaning it, and the plastic has come off slightly on the upper right hand corner close to the volume control knob and I feel like I might have to warm this up with a hairdryer.