If I was a cynical sort of person (which maybe I am a little... or a lot), I could chose to interpret some of the wording as smugly underhanded with a veil of righteousness.
But for the sake of keeping the peace, and giving benefit of doubt, I won't do that. (See what I did there? Get my point?)

I'm not mad. I didn't, "bite the hook". Peace out.

Words are just words. Actions speak louder.
No one should ever feel weird about asking a question. My impression of almost all of the people here, and especially the regulars, is that we are all good people trying to be helpful. ...And we are all humans (at least I think so...



As a side note, there is only one person in my "foe" filter because they just rub me the wrong way. As far as I know they have not posted to this thread (which is the whole point of adding someone to your foe filter), so I'll just leave that at that.
Let's get back on topic, shall we? I'll recap.
Canvas alternatives:
Linens have been proven to work well with standard wood glues (TB2). Often times they have been used as interior skins for their finer "grain".
Waterproof fabrics don't work as well and sometimes not well at all with water based glues, and you have to be careful with non-water based glues and XPS foam. Feel free to experiment and report back, or search for examples of other people who have done so. We'll try to steer you toward the people and threads that have done so; but remember, we are all getting older and most of us don't keep a database of links, bookmarks or other references. That being said, big Mike did a bunch of testing early on; seek out his foamie related posts. (If you are unaware, we call him big Mike because he owns the forum. We owe the privilege of this whole ball of wax to him, so if possible, make a donation^ there in the header where it says "Donate".) Here is his profile page which might help you track down his postings: http://tnttt.com/memberlist.php?mode=viewprofile&u=2.
I believe a mesh duck blind material was either tested or considered; may have been nylon. IIRC it never got off the ground or was unsuccessful (water proof fabric with water based glue... see above). Same for Tyvek house wrap.
The proven, thrifty, easy method comes back to organic fiber non-waterproofed canvas or duck cloth (some people feel it is necessary to wash the "sizing" out of the fabric and preshrink prior to use; others report no problems having not done this); TB2 glue; and whatever latex exterior grade primer and/or paint gives you the desired texture you are looking for (or lack there of).
Some people can only source thinner foam in their regions and have to peel the protective plastic film off before covering. Thicker foam doesn't have the plastic film because it stands up to shipping and handling on its own. Some people feel it is necessary to rough up or stipple (poke a bunch of holes with a wall paper spiky roller thing) before skinning; others report good results with minimal prep.
Do a small scale test. If you like what you see, do a medium scale test to be sure.
Most of all, have fun and build on.
