After a black undercoat I painted it all a dark green.
Next i added more light grey to the green, and completed several highlights of drybrushing.
Next i made dark brown lines all over the vehicle, then highlighted with a desert yellow.
I added dark brown camo shading to the lines.
Finally picked out detail, added decals. Used grey on edges to give the impression of chips and damage. Then drybrushed on muddy browns.
I am quite pleased with the result, and will probably use the same method on future vehicles.