I got something done again, track-painting to be more exact. You'll see it in the pics that my badly set lights (I rushed to paint on the expense of proper preparation) ended up causing some "bald patches" that I need to fix later. Yeah, it's my own fault.
In any case, the process was pretty straightforward. The base layer was done with Tamiya's XF-10 (Flat Brown) and later on top of that I liberally drybrushed some Tamiya's XF-16 (Flat Aluminium). Because that Al layer didn't look good enough I applied a Citadel's devlan mud wash. The result ended up pretty decent in my opinion, it's just a shame that I have to fix a couple of places afterwards.