I am not a bit fan of heavy modulation. For me, it is too dramatic, and unrealistic, but I know the purpose of that.
And here is first weathering stage:
_DSC3716 by Adam Kozłowski, on Flickr
_DSC3717 by Adam Kozłowski, on Flickr
_DSC3719 by Adam Kozłowski, on Flickr
_DSC3729 by Adam Kozłowski, on Flickr
_DSC3730 by Adam Kozłowski, on Flickr
_DSC3734 by Adam Kozłowski, on Flickr
Wheels:
_DSC3737 by Adam Kozłowski, on Flickr
And what will not be visible, but I will know there is some action behind the tracks ;)
_DSC3709 by Adam Kozłowski, on Flickr
_DSC3711 by Adam Kozłowski, on Flickr
Concrete took a lot of splatted Tamiya paints, some airbrushing, washes, oils, everything in random order - plaster is great because it soaks it all in minutes so work is fast and easy.
_DSC3753 by Adam Kozłowski, on Flickr