sad to see... I got my cars bonnet vandalized not this bad ... two things came handy (glass coating and pen filler)
1 - glass coating: My car was glass coated and the scratches were well penetrated in the coat but were not able to go beyond it .
2 - but at some points they did make it to paint and beyond it for that I used scratch filling pen and it almost hide it from visible eye.
3 - Right after filling the mark I got it glass coated several times again and its "Almost" invisible
4 - I do not park my car un attended any more where I can get it vandalized again
5 - car is now recording front and back 24/7 365 days always using DVRs so I can track down if it would ever happen again
