The first one is Adam's:
You can read the full tutorial here. It's interesting to me because it's an actual grey base (Adeptus, then Fortress) instead of the more bluish grey you see from GW.
The second one is Dave's:
The second one is Dave's:
You can read Dave's tutorial here. His is a similar though slightly different take on the actual grey, going from an Astronomicon-Fenris mix to a Codex Grey highlight ... complete with some weathering!
Both great tutorials, check them out.
Both great tutorials, check them out.