Nice work, looks good for my taste but since you asked criticism few points that caught my eye. That whitewash is way too perfect and well applied imo, looks almost like the camo has worn of showing grey primer underneath, specially on that low quarter front pic. This could be a photo issue too, photographing model is a pain in the ass... Technically it looks like job well done tho, I like it. Second point is tracks, more presice the snow on tracks. It looks odd to have just patches of snow inside the tracks, it's either covered with snow or polished shiny by track movement against roadwheels.