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As I was helping my girlfriend get some christmas decorations out of her basement when I discovered a long lost train set of theirs that they used to put around their tree. Its a K-Line set with 3 rail steel track from 1990 "The Hudson Valley Special). The track is sort of rusty and I can get the locomotive to run briefly but the center rail electrical contacts spark continously. I really want to get this set up and running for them so whats the best way I can clean the track and locomotive?
I have no experience with this but the first thing I'd try is a very fine grit sandpaper and a very large bottle of elbow grease. You'll only need to do the tops, and the rusty sides will only add to the visual modeling aspects.