It seems to be 1x1 aluminum wall studs. I did try and pull a sheet of the 1/8" paneling off, I got a quick peek and decided against it. The walls are all caulked and looking nice. This trailer is a toy hauler and light camping, basically a step better then a tent. This will be no where near the beautiful camping setups most you guys have.
I have been working a lot on it, in preparation of a trip coming up this week. No pictures yet, but I got AC power plug and receptales, portable air conditioning rigged in, a shelf, small storage box, start of my Etrack for securing a Rzr and a cot bed thingie. Just waiting on the Rivet Nuts to get the bed mounted.
Here's pics of the trailer outside and the start of one of the canvas cots I'm going to try and hang from etrack and use as a bed.
https://imgur.com/a/2WZsQFlIf I don't get the inside pics up by the end of this week expect some in about 2 weeks when I get back.
(Is there a way I can put Imgur pictures into my post instead of the links?)