I simply diluted both colors with water and applied it with a brush.
Finaly i secured all of it with a coat of Matt-varnish. Over this i started with streaking products from AK-Interactive - this is still in progress.
I also managed to start with the base. This is simple styropor with plaster of paris over it. After drying i sanded it smooth and glued some shoveled snow, also made of plaster beneath it. Next ist painting-time. At the end, i will glue some small glass-snow on it to gave it a snowy look