The models when I got them
I started by airbrushing a coat of Vallejo Dark Yellow over the models. As an aside, airbrushing these models was probably the most frustrating airbrushing session I have had so far. My compressor was giving me shit, the paint wasn't mixing well with the thinner - just a bunch of little problems delaying my progress.
After the Dark Yellow. I also hit the hubcaps with a little color.
After the Dark Yellow I applied the Camo Brown. In hindsight I definitely should have done two coats of the brown (spray, let it dry, then spray again) but I didn't have enough confidence in my airbrush and my own abilities to risk ruining what was already a pretty good first coat.
Should have done a second coat. I need more practice.
After the brown came the green, which is applied in less quantities than the brown. By now the airbrush and compressor were really acting up, so there were a couple mishaps with the green.
You can see the green splotch under the gun barrel. Luckily the ink wash mitigated it.
I then started the detailing. The metal parts (shovels, axes, and the treads) were painted with German Grey. The handles of the shovels and axes were painted with some sort of brown I had lying around. Most notably I used Cavalry Brown to paint the exhaust pipes, and then dabbed a little brown onto the pipes using foam to show a little wear and tear. I also added a few "scratch marks" using German Grey and a No. 2 Pencil. This was all followed by an ink wash using Didi's Magic Ink - Brown.
My now very shiny model was nearly complete. I applied some brunt Sienna Pigment to the treads to make them look worn and rusted, and used a No. 2 Pencil to add a few more scratch marks on the hull. Finally, I applied a spray of Testor's Dullcote.
And that is the finished product. I couldn't seem to get a good picture of the two of them, so this one will have to suffice. You'll notice that I still have a lot to learn about using inks to simulate a rust effect (look to the right of the gun barrel's shadow), but overall I think my buddy will be happy with the results.
Thanks for reading.