I had a 300zx a few years back with custom paint, body kit, the works and took it in for an induction system cleaning. Left the car all day. Came to pick it up and there was a small dent coming out of the hood from where somebody had left a tool. I know it wasn't there because I just know, plus when I dropped it off the service writer filled out a questionaire and walked completely around the car noting any dings, dents, scratches and at that time nothing was noted about the hood. I bitched and bitched for about an hour and got nowhere with them. The next day called the service manager, took the car in for him to see, and still got nothing. It wasn't until I threatened to go to the owner that they offered to pay to have it fixed. Terrible service from them. I know how you feel.