Paint problems of the 2009 Ford Mustang

Basically, I first noticed the paint bubbling up on the front exterior edge of my hood about 1 1/2 years after buying the car new. It was repaired under warranty but the gentleman at the body shop said that he'd seen it many times on Mustangs and other Ford models and that the problem most likely would return and it did. After reporting it a second time, I tried to claim for a new hood from Ford but they flat out refused. I also reported it to military autosource on long island, new york (the boss actually) and he bent over backwards to help me get a new hood but they refused him as well. Fortunately, I purchased the extended warranty because I've had other problems with my Mustang, the most serious being the play/backlash in my rear differential being way out of limits. It's supposed to be between 0. 2 and 0. 3mm. I had to get a second opinion from another certified mechanic who checked it properly and found that the play/backlash was almost 5mm. This is what has been causing the "clunk" in my drive train. Fortunately, the boss at military autosource contacted a top mechanic at Ford to get the info I needed to get the differential adjusted/repaired.