None of us can properly evaluate the car without seeing it.
Seeing/touching the car is required to determine most appropriate solution. Fingernail detectable scratches may often require respray but correction can still often improve matters. I have in the past yielded approx 85% correction on a neighbours black VW after her daughter scratched a smiley face on the door using the sharp edge of a stone !
I don't have rotary & only have a Meguiars G220. That said as well as various polishes I also have cutting pads, Megs 105 & I think a little G3 compound. I am currently low on wet & dry at the moment.
I am about 60-90 mins west of you depending on time of day travelled.
I
genuinely have a lot on at moment, but could possibly make time to have a go at correction if you wanted,(& if after looking at the car I thought that was a realistic option)........I do not have access to a garage at the moment so weather would be a factor. I accept beer tokens btw
I dont have a Paint Thickness Gauge so if chancing deep correction then you would have to resign yourself to a later repray if correction went too deep or failed to sort matters !
Another technique which sits between machine correction & panel respray would be touching in the scratches with a very fine modelling artist brush to raise damaged/touched in areas then correcting the whole area. This is time consuming & dependant on the paint match. I am not a professional so it would be your risk/liability if we did this !
Failing correction I can put you in touch with a user friendly bodyshop near to me with an extractor equipped oven who if I sask him nicely might help you out for close to mates rates. You would have to leave car with him & thus would need to get someone to bring you over to him & run you back/forth.
Personally I would not attempt to sort this unless fairly satisfied this would not happen again in near future.
You may not like to hear this but it is quite possible that.....
i) You know or know of the person who did this.
ii) They had a motive for doing it.
iii) They will do it again & probably get away with it.
You may be able to reduce chances of this happening again if you avoid car being repeat parked at same location/time period. Ideally reducing future motivation for the person who did this would be best.
Of course if it's young kids then hopefully it was a one off incident.
Target hardening using a secure garage, suitable lighting, CCTV or alternative parking may be most beneficial.