Ork Airfield Defence Force* Vehicles I
The models were then painted in browns and oranges and given a wash of Chestnut Ink, a little Bestial Brown and some water.
Detailing was then added to the crew and other bits.
The bases were Warmaster bases and were covered in GW's sand mix, before painting Bestial Brown and drybrushing with Bleached Bone.
* I know a more Orkish name would be more in keeping with the fluff...