I prepped and primed ~1500 points worth of 15mm BF DAK Panzergrenadiers, support and some armor last week.
Right now, I have base coated all the armor and artillery with the BF take on dunkelgelb (spray) and have done some initial test models. Over the base I've built up a few layers of increasingly light coloured drybrush paint, adding some additional light tones near the wheels, etc. (Presuming they would be dustier than the top of the hull and the turret.)
A little unwanted pooling, but unmanageable with a bit more attention. I think it's great for the figures. No way I'm three tone painting a couple hundred 15mm infantry!
I've not spent much time modeling or painting WWII stuff, so I'd be interested hear thoughts and suggestions to add realism, etc.