Has anyone considered.... skining the skin?
Using the stuff like they use on busses to advertize... or NASCAR
sort of Shrink wrap?
Or... adding a fiberglas resin thick enough to be structural over thw whole camper.
It would be nice to get some Zany ideas... outside the box.. maybe one of them would trigger a whole new way of approaching the problem.
Someone wanted to spray their roof with Linex bed liner several years ago... have't heard anything since. It might have been too heavy.
Capt PJ... you are a cruise ship officer... you know people in the boat business... have you approached them with the problem...? Be interesting what they have to say.
I'm committed to your idea and action (that's easy to say from Tennessee)
Sleepy