Khazzy

So I left for basic last year and left my car at my parents house so they could keep it going from sitting for 8+months. When I had come back, the car ran great but I started to notice oxidation taking place on the roof of the car behind the sun roof. Basically what I am getting at is the clearcoat is starting to go. The clear coat is mainly there just small chips are going here and there. Has anyone had this problem fixed before and how much would it cost roughly to get the roof repainted. I will get pics up later