Thanks again guys, it's much appreciated!
I managed to get a bit done on the base, after friggin' around with stupid acrylic paint! My airbrush doesn't seem to like it, it clogs the nozzle after only a few seconds. So, after clean-up, I changed to enamel, and was able to spray a light 'dusting of snow', and do the 'frozen, melted streaks' of 'snow' (if you know what I mean!). The idea is to represent that sort of grey/white frosty appearnce on frozen, muddy grass, with strips of snow that had melted, then frozen again. I've done a couple of pics, but they don't really show the effect, as the paint hasn't settled yet. Once I get the right look, with the 'transparent' greyish edges to the lumps of snow, and the ice-covered puddles, I'll post the series of pics, to show how the effect was built-up.
By itself, the base looks, well, plain! But once the Dora is parked on it, it should do the job, and compliment the model. I hope to get some pics up later tomorrow night (Monday).
Thanks again for your good wishes.