Deep paint scraper in new, used Q3

Good evening, I am completely desperate and more than sad and angry. I have now after several years a new, brought Q3 got. Someone has been so happy and promptly scratched with a key an oblique L. I was now in 4 workshops and 2 say, completely paint the whole side and the other two say, only paint the door. But everyone said that one will see a minimal color difference. I am currently on the following stand and share you my opinion with. I don’t want to have it completely or even only the door painted because I would disturb the color difference much more than a Macke. Nevertheless, the ,white , base varnish is unfortunately also through. Next worry would be , I let it finish (complete page 1500€; only door 400€) and a few days later I have something inside again. You never know . My idea would therefore be to carefully follow it up with the original color (have still the paint pen in the color) And then , “wipe it up.” Oh well, I would have this done as soon as I find a suitable workshop Please excuse that I don’t know any technical terms here but have no idea about it and can only reproduce what I found on the net. What’s your opinion? Would it be possible to defuse the scratch with zb Spot Repair? Thank you in advance