The terrain pieces I put together the other day have now been undercoated. I covered the bases with spackle and sand, letting both dry before spraying with Krylon paint. The shade is supposedly 'Avocado' but comes out more a khaki, which suits me well enough. I also gave the treetops a light going over to damp down the rather bright shade of green.
I intend to use spray adhesive to fix dried tealeaves under the trees and around the rocks to simulate vegetation. The rocks will be dry-brushed then inked. Time permitting I'll make a few more such pieces.