Carson,

You might try contacting the manufacturer directly.  T Clear Corporation, www.tclear.com, manufactures and distributes ProTech C-SIP panels.  The web site has some great information on installation as well.

Athough I haven't used them, I have a colleague who does and he is very impressed with them.  It saves him the step of installing drywall on the perimeter walls.  He also likes them because he can apply stucco directly to the exterior.

I don't see why your idea of simply painting the exterior wouldn't work.  We've primed, painted and waterproofed concrete and stucco for years.

Shoot me an email and keep me posted, green_oaks@earthlink.net

Good luck!

jeff

Carson;

Steel SIPs can be packaged as disaster relief housing with simply caulking the wall joints and taping the roof joints.
In fact we have supplied several utility structures as permanent buildings that way.
Eave overhangs can be as much as 4ft. (unsupported)

walls are much lighter than cement board or OSB, do not require any splines , utilizing T&G friction fit joints and require no joint fasteners

If you want to drop me a private e mail, I would be happy to supply you all that you need for your project  including samples.