I'm a big fan of Clever Models. They offer a wide variety of printed paper structures and printed textures in all scales. This is the little HOn30 display layout they brought to Springfield this past weekend. Everything on it is printed paper, ever the trains. It's very impressive. You have to touch the models to tell they are made of paper.
On this little display that I built for the EXPO several years ago everything left of the door is printed except the metal Dyna Models tuscan red metal window casting. I use the Clever products everywhere.