After realising I had not thought about the rear of the VSF Tunnelling Machine, I decided to paint it with a basecoat of Boltgun Metal.
When I first looked at the model I did initially think that the rear of the model was some kind of boiler so I was going to do it very dark. However upon reflection I think it is actually just the rear of the vehicle, what I thought was the firebox is in fact the rear access hatch.
I do like this model and think it certainly looks the part.