Bondo:
What a job. We found out early on that as we removed the aluminum, we had more repairs to make then what I had first thought. Tears along the bottom were handled by pop riveting in a small piece of aluminum behind the tear and then applying bondo to cover the tear. LOTS of sanding and elbow power applies for this type of work.
Prior to all of this we also had to remove most/all of the old paint with paint remover and then sand smooth. We are SICK of working on the aluminum. It would have been so much easier if we'd had the money to just replace it all with new.........

Here you see where a tree had landed on the top of the roof and we are repairing the dent with bondo. We also had holes to fill where the homebrew awning hardware had been. We will not be using those again since they created large areas of water rot.

Framework:

The framework is mostly done now. It took a long time to get all the pieces cut to correct size and attached to the overall framework. We drilled each hole and put together with screws along with liquid nail. Very time consuming. We needed lots of framework to insert 3/4" foam insulation inside, something this trailer had none of originally. Insulation is high on my "must have" list to keep heat and noise out of our trailer.