I have now laid all of the track and ballasted it. In addition, I have painted the sides of all the rails in a rust colour and used the Woodlands Scenic tie marker to tone down the glossy plastic of the track.

I have ballasted the main line in a grey ballast and the yard in black cinders. I have tested all of the track and everything works fine. In fact I did have one problem. Locos travelling over one of the points into the turntable area seemed to be loosing electrical contact. When I looked at the point closely, it seems that I had omitted to put in the requisite jumper leads to ensure continuity from the switch places to the outer rails. I put in a couple of wire jumpers and now everything works beautifully.

Here is what the track looks like now.