Is de-lamination a big problem? Can Azdel help?

Aluminum (stick and tin) is an old an well established construction material. Fiberglass and it's variations are by now fairly well established and lend themselves to more dynamic shapes and artwork.

Aluminum is easy to work on, repair or replace. Fiberglass is said to have better dent resistance.

My personal opinion is floor plan is the most important, followed by tongue weight and cost. What it is wrapped in, is not too high on my list.

Other have different priorities.