The weather in Sydney has been abominable with 2 heatwaves in as many weeks and a third due tomorrow. On a couple of the rare ok days I have managed to finish the tracks. I quickly gave up on hand sanding and switched to my Dremel. Even then it took 3 sessions to complete. A final session was taken up in sanding the Milliput filled divots on some of the tracks. There seemed to be 3 types of tracks, one which only had raised mould marks, one with a mixture of both and one with 2 lots of divots. Fortunately the first was the most common type. 

Having done that I now need to connect these up.