I take it you're talking to me? If so, then I mixed the Woodland Scenics with Future in a film canister and applied it with a brush. The wetter it is the easier it is to smooth but the clearer it turns out. If you want a lumpy old snow then mix it with less future. btw, It does NOT turn out slick because of the future, in fact it dries very powdery looking. Also note on the Diorama below that I undercoated the base in white plaster and white paint so it looks deep and has no under growth coming through. Seeing the ground under it could desirable if it's what you want.. You're choice. Process is the same regardless.
I do recommend practicing on a small scrap dio with the materials you plan to use to make sure there are no surprises like colors being wicked into the snow.
