I had the same issue as you had, with my 2005 BA MK II XR6 sedan. I took it back to where I bought the car and they stuck a piece of sticky tape on the bonnet and ripped up a massive strip of paint. I was like : Then they took my car for a week and it came back looking brand new ! Funnilly enough, they gave me a 2008 Expensive Daewoo Late model camira as the replacement car!!