Cleaning track in a tunnel

A recent magazine project involved me building a layout with a tunnel. After construction had finished, the track needed a bit of a polish, but there was no chance of my hands fitting through the tunnel mouths.

The solution was to take a Double O Gauge Association track rubber and stick it in a long clamp used for model boat building. The resulting rubber on an arm was more than long enough to do the job.

In the past, I've glued one of these rubbers to a length of brass for working under the Hellingly Hospital Railway overhead wires. Needless to say, I can't find that device now...