I applied the sealing coat of Future to the decals and put it off to the side. While that's curing up, attention turned to the tracks and getting them ready to go.
Yesterday I'd applied a basecoat of MM Non-buffing Metalizer Gunmetal using the AB since there's so many nooks and crannies, I wanted to get a good coverage of all the surfaces.
Throughout this process I did one track run and kept the other in the condition of the previous step so I could better demonstrate how the look changed from one step to the next. The first step involved drybrushing Steel with a 0 round brush to create a metallic foundation along with the Gunmental. The metalizer provides some nice "tooth" in its finish for drybrushing and it doesn't take much to achieve the desired look.
A little closer examination:
The next step involved applying a 90/10 thinner/paint wash of Rust with a size 1 round sable brush. The purpose of the wash is two-fold...it blends in the drybrushed Steel and also provides the first stage of oxidized metal. If applied carefully, it will allow some of the Steel to still show through but not as stark as in the drybrushed step.
The Rust wash is allowed to air dry, which doesn't take that long to accomplish, but in the process the Rust wash in combination with the metalizer undercoat takes on a truer rust looking appearance vs. just the straight paint. Once confident that it's fully dried, I used the same 0 round brush as before to drybrush Burnt Umber over the Rust to deepen the color and look.
Last step involves going back over the raised surfaces very lightly with an old worn out 20/0 detail brush and drybrush Steel to restore the worn look to those surfaces only.
A test fit on the vehicle was in order to see how they looked. The Rust still shows up more prominent at this stage than I'd like, so I'll probably give some spot attention with some black artist pastels to the too-bright areas. Also, since the final weathering with MIG pigments hasn't happened yet this isn't the true final look, but it's progressing the way I'd like so far.