and i am actually kinda worried about weight. i'm planning on almost half of my layout being a mountain range.. would paper mache lighten it up instead of joint compoundI used old screen wire, torn from window and doors. Glued stick together in to a rough shape of a mountain. Then stapled the screen wire to the wood sticks. Bought a 2&1/2 gallon can of joint compound and applied to screen. Good if you can add color to the joint compound when applying. One solid color of grey, brown, or green to hide the white. Very inexpensive, but could get heavy in weight.