I happened to be in the game store the day that this model came out. I told my friend Bill that if he bought it, I would have it back to him in 3 days. He couldn't resist.
We did each wolf different. The light wolf is meant to look like a timber wolf. Mechanicus standard grey over Zandri Dust. The dark wolf is Dryad Bark over Mechanicus Standard Grey.
I did the axe with Khorne red, Squig Orange, and Fire Dragon Bright.
This is a great looking model.
Bills Space Wolves are just grey, so I tried to work some other colors in to help the model pop a bit.