My 17 year old daughter bought a 2003 ZX2 about the time of her 17th birthday. She works to pay for it but I had to co-sign because of her age. Some of her classmates assumed that I bought her a car and did not respect her car. She got a couple small scratches and 1 door ding right away. She let it be known that "Daddy didn't buy me this car". She has had no problems since. She takes very good care of it and you won't see it dirty in the summer time.
We all went to school with kids that had nice/new cars "handed" to them. They did not have to earn them so they had no respect for those cars and ruined them in record time. I made my mind up before I ever had kids, even if I won the frikkin Lotto, they would buy their own cars.