been playing with mold 83 some more and assembled 2 more pieces (will be posted later). While doing so I found a paint combination I like for the stone.

You start by priming the plaster with a latex house primer like Kilz to make the piece a bit more waterproof. You will want to do this if you plan on doing any washes, otherwise the paint just bleeds and doesnt pool in the areas you want. after this is dry hit it with black spray primer.

Now it is time to paint, for a base coat I use FolkArt "Asphaltum" this will not give a solid or even base coat with one coat, but that is fine. second up is a heavy drybrush of FolkArt "Mushroom". Next is a light drybrush of FolkArt "Vintage White" to capture the highlights. lastly you do a very light wash of Reaper's Master Series Brown Liner.

Here are some CD terrain pieces I put together using the Rock Cavern Root Mold #83 from Hirst arts. I think they are also useable as regular aboveground terrain like Badlands.