| Looks good! One thing that lets it down, the front tyre looks very black, it might be a good idea to get some weathering pigments and really tone it down with some Mig, light dirt pigment to make it look dusty and crudded up a bit!
The mig pigments can be mixed with thinner or even water and can then be used as a wash to get into the corners too. Would work really well on the wheels on the tracks too.
If you mix with water you can put a lot of it on (the model) and then wipe it away with a damp cotton bud and really tweak the amount of weathering to taste!
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