Why would you be using a razor blade..Does the glass have some stuff on it(sticker) that needs to be removed,,?
to clean arcade machine glass...
I use a Spray on Foaming Glass Cleaner & news paper...I don't want a liquid to run down the glass and go into the machine.
When I read the thread I went and cleaned all the glass on my machines
Yes there was some packing tape on the glass for a long time.
I'll post pics tonight. When cleaning glass for making frames, or applying tint I scrap the glass (without harming it) with a razor and tons of windex.
It makes it the cleanest surface ever imaginable. But I have never worked with smoked glass.