Just a small update;
Had a bit more progress today, i redid the white around the score reels
1st pic shows what i had to remove and why i was redoing these sections, it looked ok from the front unlit, but looked rather ordinary when backlit, showing up the brushed on touchups someone had done
2nd and 3rd pics cleaned glass ready for masking off the score reel windows
4th pic, masked off and acrylic flat white applied (actually white primer).
After a failed attempt at this using masking tape (the edges weren't as clean as i would've liked), i ended up using frisket as the masking material which gave much better results!