I will have to revive this as the same thing happened to me. 2-3 weeks after i drop off the car at the airport to people that did a quick inspection and said it was fine I got an email with a photo of some scratches on the wheel.
Apparently in Germany this costs $600 to buff out. Are you insane?I saw that buying an actual wheel was cheaper than this. I even paid for their insurance, which was already ridiculously overpriced. Never renting from Sixt again and I am already emailing all of my friends and colleagues at work.