An unexpected, but welcome paint day today allowed me to do some magic with my airbrush.
First, I added a very light dusting of tan to the objective marker, which makes the sand look so much more realistic, and gives the hatch a nice weathered look:
Next, I experimented with a camouflage scheme for my sentinel:
And the same on my chimera:
Annoyingly, they both look way better up close than the photos would lead you to believe. Still, they are WIP shots, and they'll look better with details added.