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What kind of maintenence is required on about 46 feet of nickle/silver ho scale train track? - ho scale track

We have an HO scale trains on the ceiling of our room and we began to scale with the brass there over 20 years and was a big mistake and havnt for some time about cleaning too much and we decided we gona get it started again and supersedes all metals with a silver coin or track and I exactly know what type of cleaning wana, you need

Thanks

Wanstead sure where this question is raised, so I thought this would be a good place