Looks good, the car is especially nice. You're doing some good stuff, the only suggestion I can make is some smoothing group related stuff with that signboard rounded section and with some other models. Also, I would experiment with your textures with adding some wear and grind to them, I think that will help them out a bit. Also I would work on the snowy parts, I'm not sure what technique you are using but it looks a little artificial currently. I haven't really done much with snowy stuff, but I would suggest not painting white over a texture, rather use a layer of a nice terrain snow texture and cut away at it with the eraser. Use a harder edge that what you seem to have been using prior to now. Lower the opacity of the snow slightly and go to work with the burn to give it some depth. Spend some time on getting a nice technique and then you can easily apply it to anything to give it a nice frosted look pretty quickly.