I like your weathering, the paint chipping looks very good!
I would personally brighten up the wheels as yet, as the tracks and generally the lower half of the vehicle is mainly copper, wheels being more silvery/grey might help. Overall very good, although you need to do something with the wire on the truck, at the minute it looks far to bright and out of place, mabye try washing it down?
Hope this helps, have some rep to keep you going!
'If you fail to prepare then you'd better prepare to fail'