Predicta Princess, physical restoration advice?

[judge]

I just got this Predicta Princess and would like a little advice on physical restoration of the base. It's has some rust/pitting that is showing through the original paintwork, so I am wondering about getting it powder coated, but I am a little concerned that the metal grille on the front would end up looking uneven. In fact the metal grille is the main part that I would like to clean up as it shows discoloration bands that I assume are caused by dirt or rusting inside the perforations. Does anyone have any experience with that?

The second thing is the screen cover. It has some streaks etc. that are effectively etched into the surface and some scratches where I think someone has attempted to remove blemishes before. It also has a small crack, that I figure nothing can be done about, but that is OK. I am reluctant to try to polish the blemishes out, as I have no experience with doing that. I tried a polish that Inhave used very successfully on Bakelite (well, plastic that looks like Bakelite) in a small patch that would normally be hidden, but it left some fine scratches - maybe that is down to the material I was using to apply the polish? I have no idea. I really need to find something I could practice on? Any suggestions? For example I have some acrylic sheets I could use.