I decided the ground looked too stark and grey, so I went over it with a thin mix of flat earth and desert yellow, sprayed randomly and from a distance. This was followed up with a pigment scrub of light Sienna and desert dust, most of which was then blown off with the airbrush.
Its been a pleasure watching your build come together Bob. I certainly learnt a couple of things in the process. I will look forward to having a look at the finished build. Well done mate