My vehicles are undercoated, I've used flat grey car primer.
Undercoated and ready for camouflage.
I added a small rectangle of plasticard next to the jerry can before I painted them,this will be a first aid kit when they're painted. The grey paint shows up the detail much better than my previous photographs.
Since taking these photographs they've received a coat of Vallejo reflective green. Now I just need to decide on what extra colours will be used for their camouflage pattern and how I'm going to apply it.