I have been busy painting some of my kallistra boards white for battles on the eastern front in the snow. In the pictures we are playing Tide of Iron with plastic soldier company tanks and using the T of I infantry as these pieces are customisable.
This looks interesting! We've had quite a number of requests for moulded white hexon boards over the years - singles as well as full boards, but we have so far resisted the temptation to have a production run of white. A increased interest in 'winter war' might further increase the pressure for these. I've used woodland scenics snow scatter over green and earth boards before, then vacuumed the boards 'clean' again after use.