Basing
The basing on these guys was really simple. I added pumice paste to the bases. I let it dry overnight any time I use it. It's great, but you've got to make sure it dries really well.
Then I painted it RPP Volcano Brown, and drybrushed some light RPP Fireglow metallic on it. I do this to create definition to the "soil" and give it a unique look.
Once the paint was dry, I painted on Elmer's glue in various areas, and then sprinkled static grass on the bases. I let it sit to dry, then shook off the excess. To give the finishing touch, I blacked in the base using RMS Pure Black.