Woodland Scenics Snow is the best product to use. Just put down some gleu, I use pump hairspray, and sprinkle it on. If you need it thick in areas, repeat the glue and snow sprinkle process. Blow off any excess once dry.
Gino P. Quintiliani - Field Artillery - The KING of BATTLE!!!
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"People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf." -- George Orwell