That would be a nice change......obviously rails wear down over time where the wheels track, but it is still a great visual effect to have them painted. The standard B&M steel gray has gotten really old. Just look at Vortex at KI (well, when it was new!!!) and King Cobra. Painted rails look especially pleasing when they accent (match) the stripes on the trains.
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www.angelfire.com/oh4/tk173 First rule of Stormtroopers: Pee BEFORE you put on the uniform!