for melting snow i mix up gws snow flock with gws ardcoat, this creates a wet looking white mass that can be transparent, this is then allowed to dry for a few minutes. for unmelted snow i just give it a quick white drybrushish add.
the finnished surface is somewhat paintable i guess, never tried osl on it, perhaps i should..hmmmmm
the finnished surface is somewhat paintable i guess, never tried osl on it, perhaps i should..hmmmmm