Did someone vandalize your ST?? It shouldn't make a difference on what brand of paint it is on glass, a razor blade and some windex would work wonders (not on the tint if it is inside though)
no i just recieved a pinstriping brush and house of kolor paint for christmas and was thinking about messing around on my back glass but before i did i was gonna see if it would come off
I would practice on something before hand... Get a piece of glass or a cheap mirror from a consignment shop, set it up vertical (like you window) and practice on that...