I've inherited a Marklin K setup. The metal parts of the track are oxidized (covered in white powder, plating is Zn? Sn?) and don't make good electrical contact. What can I do to clean up the track?
A previous posting on this n.g. suggested MAAS, available in Walmart for cleaning wheels. Is liquid wrench OK? (good for iron, but I don't know what it does on the plating on the K track).
Alternately I was thinking of brushing on ammonia or vinegar with a tooth brush.
Thanks Joe