I used that stuff on the old truck rocker panels and it is super tough.
24 hours after painting the “trim” it wrinkled up! The Wife says not to worry though, it looks like the hammer tone finish I used on the wheels!!! From 0-8 feet away it looks terrible…. further away you’d never know. I won’t bother to strip & recoat it until Spring.
I’m adding some support to the AC unit cross member, then the roof insulation and paneling is going on. After Grattan in a few weeks I may remove the rear doors and reskin all or part of them before Winter arrives.
I’m not investing in another trailer, this one is paid for so we have to keep it together.