For the cloak I based it with Reaper muddy soil, then dry brushed it up with lighter shades of brown up to an ivory color. For the hair I think I based it with a dark tan and then highlighted up a couple of shades of lighter brown. I used all Reaper paints except for a few GW washes in a few spots.
I usually don't do a lot of dry brushing, but the texture on the cloak lends itself to dry brushing.
For snow I just use baking soda. I use PVA glue and then apply the baking soda, wait for it to dry then use a spray sealer to keep if from flaking off.Then apply a second and third coat as necessary to build up the depth.