When I washed my car last night I noticed some damage on my left rear rim. This wasn't there on Tue. The only driving we've done since was to a restaurant in a hotel that requires valet parking and to take our son & DIL to the airport. I don't remember any incident while driving that would have done it. What might have caused this? Seems like it was hard rubber of some sort to have gotten in there like that. I've always shied away from using valet's. The only other known incident I've had was a few years ago there was something on my steering wheel after valet had returned it. A couple of days later I noticed something on the headliner. We finally tracked it down to a valet driver using oil in his hair and had gotten it on his hands before driving my car. The hotel denied it until someone else complained and then to their credit called me to let me know what had happened. The paranoid side of me sometimes wonders what other damage has been done that I've not noticed at the time.