Phil-lee... Thank you for posting. I'm a big guy and I thought your idea was a good one.
I own many games and have owned well over 200, in the past 28 years, since our first purchase Funhouse in 92'. Ive done some great things to my games and some not-so-great. Live and Learn. That's why I shared this.
I'm always learning something new. As I mentioned: I lucubrated the glass with a fine mist of Purple Power cleaner. I carefully did a ~10" pass x width of glass, then cleaned it. It was perfect. I did the 2nd pass ~10" and did the same, no scratches. I decided to do the balance of the glass and the further I went, the more scratches were done. I didn't notice this until I cleaned the entire glass.
In hindsight, I should have not been so satisfied / confident and checked each pass. Plus, I probably should have used 3-4 new blades, not just one.
"If" I were to do it over... I would have taped off the ~1/2" clean glass (under lockbar, side channels & back channel) and simply wiped it with Lacquer Thinner in small sections, till done. By tapping it off, it wouldn't allow the lacquer thinner to slightly wrap under glass, onto the treated Invisiglass edge/side.
Hopefully my experience has helped others who find themselves in a situation.
Thanks for all who chimed in.
Kerry