1. Basecoat with Mechanicus Standard Grey .
2. Wash with Nuln Oil .
3. Drybrush with Karak Stone .
4. Drybrush more lightly with some Screaming Skull .
5. Glaze the rocks with Dawnstone , pulling your brush towards where they will be highlighted.
6. Highlight with Administratum Grey .
7. Mix some White into your Administratum Grey and highlight more selectively.
8. Finsih with a few small White highlights.
9. Paint the base rim Black .

Finish with tufts and a little snow flock. I mixed my flock with PVA glue with watter, PVA glue and a little Ardcoat to create a paste and applied patches. For the tufts, I used Army Painter Wasteland bases, but any dried, yellow tufts should be fine.