Paint on frosted glass removal

[Tigercubrider]

like an idiot I masked some dividing doors using frog tape, 15 panes per door, two sides.
Somehow, I managed to fail to notice that I missed three panes on one side (due to the tape on the other side I assume)

I used satin paint and have scraped most of one pane, but have two left and it took ages with a Stanley bladed scraper - because (Sod's law) the paint is on the rough side it is a bitch to clean

Any ideas for a quicker solution that won't scratch the glass? I have a couple of brass brushes, and a dremmel . Nylon? Brass?

Ta

 

[foxhole]

paint stripper, mask the new paint.