Skyrar's Darkwolves, Part Two!

Finished the last man of my Darkwolves squad. Love the look and feel of them so much, I think I'm going to build another squad of them in October when the Space Wolves are released.
At the moment I'm working on the Rhino attached to my Darkwolves. Base coated it black, then followed up with a coat of Catachan Green. I'm at a loss from this point on though. Not too sure What to paint Shadow Grey and what to leave Green.


And now some pics of my workspace and army...