In message , Keith writes
It certainly doesn't cure 'all' of the dirty rail problems. One of which in our case is quite critical where the increasing layers of black gunk from the [eventually] filthy rails crept into the points. This causes all sorts of silly problems - with the indicator system. We have over
175 sets of points controlled from a single central consul, so the panel mounted indicator lighting [both 'clean' single throw and set routing] is quite critical :0) The only reason that we decided to clean the layout and re zip it was this increasing problem of amber indicators [Green throw - through route, red reversed throw, amber - no clean throw so fault indicated].Good point. It was very tempting to just clean off all of the point contacts and keep the system running without a complete all over clean. Probably decided, [I was personally over ruled] because the layout track work had begin to look a lot worse than the twelve inch to the foot system running into the other side of the platform :0)
Cheers.