Hi Kurt,
It’s pretty easy to plan ahead and leave some areas, say on the hull sides, without any of the 3D texturing and then blend the earth and factory base colors together at those spots. This is similar to what I’ve done with the outside centers of the wheels on this build.
With regard to suspensions with more “complex” finishing schemes, there’s really not much difference.
Here are a couple of shots showing pretty much the same method and finishing sequence on mt Tamiya M10 (DML link-to-link tracks, but otherwise stock kit suspension).
The finished model…
