EEK! Well spotted.
We used to clean track with a fibre glass brush. Tall signals were unplugged for safety but ground sigs often got swiped off so are mostly blue-tacked. Clearly this one got reversed when photographed by me some time ago.
Just checked it is now the right way round so Chris' piccies will be cosher, phew!
Now I have banned fibre glass brush cleaning, I really ought to de-blutack them as it shows occasionally.
As an aside but possibly of interest, I have tried many track cleaning regimes since 2008 when the ban was decided on.
1. Cotton bud or rag soaked in solvent, effective but as bad as fibre-glass brush for detail damage. Dead tedious too.
1. CMX tank waggon ( sic - shows my Broad Gauge inclination ) ....a pig to convert to P4, works Ok but needs a diesel-adhesion to tow it up my 1:40 and sticks like s£$% to my Plasticard cobbled level-crossing. Struggles to traverse a double-slip, too many rails, too much friction.
2. Lanarkshire Models modified brake van with drum roller....roller too narrow for P4...needs large mod.
3. Pendon-style hardboard dragger.....quite a lot of work to make but working well here.