I have to agree with you about Wikapedia. There never wrong or confusing...
That's why I mentioned first where the info came from.
I'd also agree that If I were building a rig for -25 F , I'd probably have used a composite skin over a 2" steel frame. And may have thrown a bit of added weight into the rig by adding a layer of 1/8" luan as an exterior underlay between the composite and chassis.
Not sure if I like that idea, just brain storming here.
I'm just a bit leery of the FRP skins with nothing but the foam as a backer.
I should have been more clear when I mentioned glass over wood in my previous post. I was talking of laying up a resin skin ( hand laid over a wood skin ). Heavy....
It defiantly gets cold in Colorado.... Here in Oregon , not so much.
One of the reasons I chose aluminum skin because it is malleable ( sp ) My roof and sides are all lapped over each other 1 ". ( roof over sides , front over sides , sides and roof over rear bulkhead. Then the corner trim is applied over the laps. )
The FRP sheeting requires one to rely solely upon a mechanical seal on all edges.
I'm excited to see pics of the chassis on the truck. Should be a good day.