I lent my car to my dad once..
Well, to be completely honest he just took mine because I blocked his car in. But nevertheless, really? That’s the bumper, the trunk and the tail light!
First shop I was at wanted 200€ for that. Second one told me he could try to polish it out for 30€. I figured, 230€ isn’t much worse than 200€ so I gave it a shot.
It’s almost unnoticable now and he even did some other parts on the car which the previous owner has to answer for, though. The tail light isn’t noticably affected so I just left it at that.
Lesson learned: Never lend your car to anyone 😀