Hi, Josh -- I get most of my stuff on the internet, but, spend very little on the hobby. Plaster and paint is cheap and go a long way! 

Peter Sardagna said:I used plaster of Paris in a small sieve from the kitchen. By tapping the rim with a heavy screwdriver, the plaster dust falls, lands and accumulates just like real snow. I seal it with a mist of water from the airgun in those areas where the dust might interfere with operations. Before I start, I lightly mist everything from above to give it a good base.
Fun!
Biased turkey said:Do you mean that you seal it with a mist of water from a spray bottle ?
I don't get it how an airgun can create a mist .