Last night I rebased 4 stands of mounted cossacks, which leaves me 12 stands for my "spring/summer" force. Under the new rules I much prefer to use one smaller mounted platoon (typically 9 stands all up) and one larger dismounted platoon. With the large bases I find that fewer mounted cossacks works better for me. The other thing I do I only base 3 figures per stand for the mounted cossacks, which gives me a couple of extra stands of infantry over a whole box. My cossacks were made from to of the old box sets so I have 4x tankcha to make up at some point as well.
I have another 4 stands I have just undercoated and intend to paint up over the weekend and the mounted component will be ready. I'm going to order a platoon of dismounted cossacks and mix them up with the great coated infantry as the dismounted platoons for this force.
The bases are just permafilla which I then highlighted with a gloss white to brighten the up a bit- the permafilla itself is a bit of a "dull" white so the gloss paint lifts it somewhat. Usually I cover the bases with a combination Woodlands Scenic Snow/ Baking Soda/ PVA glue and water and may end up going down this route again but the permafilla + gloss paint works quite ell. The trick is to use a damp paintbrush to push down the permafilla and make the "snow" smoothish.
I also rebased the mighty 76mm artillery pieces, very cool models. The gunshields have been given a light white wash to blend in with the scenery. These regimental guns are pretty handy as they can be combat attached (as can the 45mm AT versions) giving me lots of flexibility. Of course this means that I will also need to add some horse limbers as well...