I don't know what Scipio used, but I do a lot of 1/35 military dioramas and I use Woodland Scenics Soft Flake Snow, SN140. Comes in a 32 oz shaker plastic container for about $11.00 US here in the States, and that size will last you a very long time. I did a 12" x 18" winter snow scene and used about 15-20% of the container. You should be able to get it in most hobby stores, particularly those who cater to model train layouts. One big advantage is that this stuff will (reportedly) not yellow with age.