Lots of the "classic" well-known model railroads used paper/cardstock structures in "O" and "HO" and they looked very fine. I photocopied plans for a building from MR years ago onto the heaviest paper that Kinko's had. Then I made "layers" of paper and added various thicknesses of styrene. Looked nice on a module 'til another module fell on it in transit...life of an N-TRAKer. :
