When F . J . of Billerica, Mass . wanted to know how to clean the steel rails of a model electric train set, which had gotten black ( not rusty ) and were not conducting electricity very well, we suggested rubbing the rails with emery cloth.
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More Readers to the rescue : When F . J . of Billerica, Mass . wanted to know how to clean the steel rails of a model electric train set, which had gotten black ( not rusty ) and were not conducting electricity very well, we suggested rubbing the rails with emery cloth.
