Your project is looking great. The diamond plate is a really nice touch.
I know just how much work delamination repair is as I'm right in the middle of some major delamination repair on a vintage Class A motorhome myself. I tore a good section down to the frame. I used West System epoxy to re-laminate the filon to the substrate.
I knew going in that I was buying some serious water damage. There are so many coaches that people unload for pennies on the dollar because they get a quote to repair the delamination and are floored by the expense. I got an older coach for very cheap so I could learn the process of repair. I intend to buy some newer coaches with delamination issues, do the repairs, and then sell.
I know that wasn't your intention, but I really appreciate the fact that you tore into it and decided to go for it. You're going to have a travel trailer that is far better constructed than the factory. Great job!
If you want to get an idea of what I am doing with my project, here's the link:
http://www.irv2.com/forums/f65/87-ge...er-389774.html