As promised here's a few snaps of the track following painting. The whole lot was sprayed with PP Weathered Wood (let down with approx 50% cellulose thinners and airbrushed using a cheap 7 quid single acting brush). Rail sides were hand painted using Humbrol Matt Rust.

You can just see from the first photo the sleepers have been gapped close to the rail nearest to the viewing side, making them invisible from normal viewing angles as shown in the last photo.

I really need to get the baseboard made don't I