Backglass Repair:
As mentioned, the backglass was in good condition, with only very minor flaking. It was given several coats of Bodytech clear acrylic lacquer. Pieces of cardboard were cut and placed over the score windows. It was given two light coats, allowed to dry, and then given two heavy coats.
This was my first backglass I sealed with acrylic lacquer. And to this day its still as good as the day I sprayed it! I was really careful not to spray too heavily for the first coats. As I said in my Solar City resto thread the inks can bleed back through the white light diffusing mask if sprayed too heavily, so very little bleeding back of the coloured inks occurred on this glass.
Another trick I experimented with (a few years later) on this glass was to re do the blue display filters. I actually made stickers by printing a similar coloured blue onto clear adhesive inkjet label, cut them to just larger than the score windows and stuck them onto the cleaned off glass! I finished them off with a layer of mylar to protect the ink. The colour isn’t quite the same shade as the original blue but it looks MUCH better than the crappy worn/scratched filter ink I had on this glass. I was impressed enough with how this turned out that I also later did this on my Solar Ride and Roller Disco glasses.