I had one small clearcoat pop smaller than the size of a dime that is up high on the streetside middle of my 2004 Classic. I put some automotive clear coat over that spot and 2 years later, the clear coat has held and I've seen no further deterioriation.
Your story regarding the Airstream refinish failing is not new and in many cases dealt with a clear coat product that was being seriously compromised by EPA regulations. Hence why Airstream gave up on the process.
P & S does a great job in refinishing failed clear coat. Here is the link to their site. All About P&S Travel Trailer Service
The 34' unit on this page belongs to a fellow in south east Missouri. It's a '97 which had a severe case of clear coat peel. There is a picture on the same page of the streetside rear corner of that trailer prior to refinishing. The folks at P & S not only refinished it but they polished it and redid it in 2005 graphics. It would fool most people unless you saw the dated wheels. I saw it close up and it's a beautiful job. Unfortunately the owner went through a hail storm so it has some dings, but the clear coat is still doing great. I would recommend these guys over having it done by Airstream since P & S will spend a lot more time on the prep phase.