I've had my Prius for six weeks, 500 miles. I just noticed the first cosmetic damage to my new car. There is a dark grey plastic cover inside the car, to the left of the driver. The buttons that roll the windows up and down are in the plastic. The paint has become blistered, more accurately, there are a lot of small cracks in the paint. My left leg rubs against the paint in the spot that is damaged. I usually wear shorts while I'm driving. The cracked paint must be caused by the sunscreen I put on my legs.
This problem has been already been reported in a few different threads already, do a search. In most cases, Toyota replaced the parts.