sci.electronics.repair seems dead so I'll ask here: Is there a solvent that's OK to dunk the whole rotor and stator of an e.g. Lionel universal motor in to clean it up? Like say fill a bag with the solvent and parts and then toss it in an ultrasonic bath. Would something like anhydrous isopropyl be appropriate? The disintegration of a nearby carbon-zinc battery has made this assembly a sooty mess. 8-(
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