Hi polybear, the ones in the pic were all done in my acrylic phase. I used Games Workshop colours as shown below.
I've just realised a couple of colours are missing, the wonderfully named Bestial Brown which is darker/browner than any of the above (not used it since the very early builds in my thread, I find it too dark) and BoltGun Metal to get a silvery finish on some of the wagons.
The colours below are in my current palette of enamels;
Humbrol 34 White
Revell 76 Light Grey
Humbrol 64 Light Grey
Humbrol 28 Camouflage Grey
Revell 99 Aluminium
Humbrol 83 Ochre
Humbrol 121 Pale Stone
Humbrol 71 Oak
I always now try for a much lighter effect, the dark washes used to get the gaps in the plank to show up will tone down the lightness.
HTH.