I've been using the FoW US Armour spray paint for these over a grey polyurethane primer and found that its colour match to Brown Violet isn't overly good. To this end I've been working on fast and dirty methods to bring the colour in line that I can do in batches, below are the results I'm going to be using.
You can see to the left the base sprayed vehicle and to the right you see it with a Badab Black wash and Vallejo Brown Violet heavy drybrush. Over this I'm going to try something new to me and try some over highlighting with basic panel painting.
I'll update with more examples tonight/tomorrow.