Mr Ripley, if you can find it definitely a neon orange sandstone type spray for the tracks, go on do it, do it, do it!!! 
You could get some of those small metalic type coloured beads used for making necklaces to go in the bottom of the clear coaches, they should be small enough to look good, but big enough not to leak out of any holes
You could get some of those small metalic type coloured beads used for making necklaces to go in the bottom of the clear coaches, they should be small enough to look good, but big enough not to leak out of any holes
Happily collecting things all my life...
![[-]](https://www.blueplastictracks.org/images/collapse.png)