Hi Marc and Dennis, thanks very much for your comments fellas, I appreciate them.
I've been fiddling with highlights on the uniform over the past few days, trying to have a nice subtle colour change and smooth transitions.
I decided that I'd use pastel chalk to help create that desert dust effect that makes the uniformlook like its been sand blasted. The beauty of pastel chalk is that it is real dust, and you can put as little or asmuch as you want on,and if you don't like it, you can simply wipe or blow it off.
Pastel chalk also eliminates any shine caused by the acrylics and leaves the surface dead flat.
I also brushed some red brown pastel over the face and some black to create the 5 o'clock shadow. Once again, I've gone for subtlety with this effect in the hope of creating a natural look.
Before I primed the face, I stipled the area of the beard with the pointy end of my hobby knife blade to create some rough texture on the skin to represent a light stubble. The black pastel chalk has picked up this texture to create quite a realistic looking stubble effect.
As always, I welcome any comments.