I'll answer my own question: Not yet! I'm going to be posting some WIP pictures of my new Earthbreaker. The "metal bits" are airbrushed black, steel, silver. The rest of it was airbrushed with a kit I bought for some WW2 American gear (an M24 Chaffee, Jeeps, M5 HMC, etc.) that I loved so much I decided that it should be my "dwarf scheme" if you will. The kit is called AFV Painting System; US Army Olive Drab, Verde Oliva USA 78.402
It's got 6 paints in it, in order of application they are:
608 - US Olive Drab Primer
013 - Yellow Olive
016 - US Dark Green
043 - Olive Drab
044 - Light Grey/Green
522 - Satin Varnish (not applied to the mini)
Vallejo also makes similar sets for German, Russian and British tanks too in case you're interested.
Like I said it's a WIP and I took the photo on our dining room table so the quality of the lighting is off but still, that Earthbreaker is CRABTASTIC!