Painted square on windshield

[Michael]

Thanks for all the input. I guess, I'm gonna have to try to fix the glass, if possible and replace the windshield if that isn't feasible. And/or put a sticker on it. Sticker is illegal in Denmark, so that's kind of not the best solution.

Would anyone care to offer an opinion on wether it is possible/feasible to replace the windshield at a non-delorean workshop? (For easier logistics.)

I can't imagine it takes a certified D shop to replace a windscreen. It might be a good idea to fix or recover the A piller trim if it is in need of fixing.
If your windscreen has the embedded antenna then you will not get a replacement for that and have to go to an external antenna.