Box trailer build... What wall materials??

[SVO G-Rilla]

So I've started on my first trailer build converting an old lighted road sign trailer into a box trailer for storing all our tent camping gear. It will have a rollout galley and gear storage as well as on board water and power.
I'm closing in on time to start really wrapping my head around the walls, roof etc. Originally when I started I'd planned on just doing plywood painted with a good exterior paint and being done with it. Then thought that I may want to clad plywood with thin aluminum sheet for a bit more external durability and even had the thought of possibly doing Rhino or Raptor liner on the exterior instead of aluminum.
The only thing I think I've decided against from the beginning is steel, seems much too heavy (though I know some would argue this point) but more so because I don't currently have a good way to cut heavy sheet at home.
What are you guys using or prefer? Anyone have a different process for using plywood? Different materials altogether?
Whatcha got?
Also.... pics just because...

 

[Teardropper]

Bedliners (or paint for that matter) over bare plywood likes to crack. Yes, some folks get away with it– I suggest you fiberglass/epoxy/prime if you go that route.

Teardrops are sheathed (over wood) with .040" aluminum. It's thin and easy to work with. You can cut it with a fine-toothed jigsaw blade and edge trim with a flush-cut (bottom bearing) router bit.

Consider diamond plate for the front of your trailer otherwise the aluminum –or whatever your finish is– will get beat up.

Tony

 

[Alloy]

Excellent workmanship!

 

[SVO G-Rilla]

Thank you. I'm a fabricator by trade but this is my first time building one of these.

 

[billiebob]

Look at commercial cargo trailers, they just use a real light aluminium skin screwed to the steel stud frame with no backing.
The nice thing about it is there is nothing to rot, water drains freely, and it opens up easily.
I'm adding a left side door here, done in a day.
Mine has over 100K miles on it.

But no matter what you do, try to store it under a roof.

 

[SVO G-Rilla]

Bedliners (or paint for that matter) over bare plywood likes to crack. Yes, some folks get away with it– I suggest you fiberglass/epoxy/prime if you go that route.

Teardrops are sheathed (over wood) with .040" aluminum. It's thin and easy to work with. You can cut it with a fine-toothed jigsaw blade and edge trim with a flush-cut (bottom bearing) router bit.

Consider diamond plate for the front of your trailer otherwise the aluminum –or whatever your finish is– will get beat up.

Tony

That's been what I've been leaning towards from the beginning but me being cheap was contemplating just the plywood just from a cost perspective.
At the end of the day I'll probably go with the aluminum cladding unless someone has a better different idea.
Also to note have an aluminum diamond plate storage box that will go on the tongue which should do the job deflecting debris.
Thanks for the input.