I don't know about the rest of you guys, but I think that the "clean" tracks fit in very will in the context of the dio Ibleedsteel is making.
I often think we modellers fall into the "rusty" trap too easily. The WWII tanks we see, as a rule, are static and have been sitting still in a museum for years. In this case, the bare steel of the tracks has acquired a layer of oxide. If, as is often sadly the case, the tank is outside, rust can get pretty heavy over the decades. So, we get a picture in our mind that WWII vehicles were rusty things. In fact, exposed metal tracks are kept surprisingly rust-free on an operating tank. The endless motion and abrasive ground "scrubs" away any oxide that forms on the surface of the metal. The only thing that hides this "shine" is dust, mud or snow that may be a feature of the terrain that the tank is operating in.
Ibleedsteel has his shermie on a cobbled street, suggesting that it has spent some time street-fighting. So, the substructure wouldn't be covered with mud and the hard stone ground would keep the metal tracks burnished. There'd be dust from the rubble of destroyed buildings, and I think Ibleedsteel has shown this very well.
All in all, I guess I'm trying to say that it's always very tempting to over-weather, and I think that Ibleedsteel has done a great job in standing up to the lure of dark wash and rust pigment!
