Tailgate problems of the 2006 Ford Expedition

I have a 2006 Ford Expedition eddie bauer under 5 years old that the tailgate is severely blistered all over, paint has even popped off of it. There is also some on the hood. The local Ford dealership admitted that Ford had a problem with the blistering paint and told me how bad my vehicle was. They took pictures and sent to Ford. Ford rep denied it and I was told that even if holes appeared as a result now they would do nothing for me because they had already denied and only look at a claim for one thing one time. I pursued further by calling customer service and emailing them as well. The customer service rep also admitted there was a problem with paint blister but could do nothing for me because it had already been denied. I have owned Fords all of my life and even worked for a Lincoln Mercury dealership for several years. I am continuing to pursue this as far as I can and ask for any help that can be offered in this matter.