I had a Saris Bones rack on my old car and it scratched the hades out of the trunk lid where the rubber feet where. I'm now using it on my new car and went to the pain of wrapping the feet in padded cloth and sticking material between the clips and the trunk. The thing hasn't fallen off yet, although I take it off when I'm not carting a bike around. My old car was a dark green, so of course it would show the scratches more than my current light colored car, but I'm still being overly cautious about scratches.