It was an experiment using baking powder. The base if floral foam, covered with spackling compound. Once dry, I paint it with a heavy coat of craft paint (you know, the inexpensive stuff from craft stores), bone white with just a touch of light blue mixed in. I also mix in a little white glue, say a 5 to 1 ratio paint to glue. While that is still very wet, I sprinkle on a heavy coat of baking powder. Let all that dry, then turn the whole thing over and let the excess powder fall into a trash can (look out for the plume of powder, it gets everywhere!). Try to leave as much of the powder in place as possible. Now coat it all with a heavy coat of hair spray to lock everything in place.
I thought about coating it in a semi gloss clear coat to give the snow a little shine, but honestly I forgot about it I had already mounted the gun and crew, so I will try it next time.
Thanks for the kind words!
Dud Dud's model collection