 We've done a professional chemical analysis of the black gunk that builds up on rails and wheels, and we've found it's largely metal oxides caused by micro-arking between the wheels and the rail. The wheels make electrical contact at a tiny spot along the inside railhead, and that's where the micro-arking happens, literally exploding microscopic metal oxide particles all over the railhead and the wheel tread. Just cleaning the rail will do nothing to stop the micro-arking. After cleaning the micro-arking will resume, the oxides will build up, and the trains will begin stalling again. So, what if we could put something on the rails that actually reduces the micro-arking and dramatically slows the production of the metal oxides?