Right now, the dirt is totally concentrated around raised details, as if someone had halfheartedly wiped the vehicle clean. A light overspray of your dust color mixed with clear flat will unify it a bit. I do like the concentration of light dust in nooks and crannies on a dark paint finish. It's something widely seen in real life, but most modelers usually use dark washes to depict dirt.
Also, the outer face of the track will probably have more bright metal from being scoured by ground contact, unless the tank has been sitting for a while, in which case the inner face should be rusted as well. The rust itself needs a clear flat coat.

Great weathering. What kind of pigments did you use?

How many builds you got going at the same time?


Ronnie