The clear coat on the 4 rims on my 2013 X-3 is chipping and failing. . The vehicle had less than 19,000.00 miles when I first reported this to BMW. The car is a Florida car and has never seen winter driving and is still in showroom condition, except for the wheels. The BMW factory rep told me that I must be using a harsh wheel cleaner and damaged the wheels due to improper cleaning, which is definitely not the case and BMW is denying my warranty claim. The are offering a 50% goodwill discount on new rims which I refused. Any advice ??