I have used rubbing alcohol with a washcloth for years on my tubular track. I haven't had any problems. I think you would want to shut down any open campfires that were operational on your layout for sure. Also might want to be cautious around that new flame throwing smoking tank car I recently saw on the forum. I use scotchbrite pads for the older track. For really old track I used to use a wire brush on a grinder before putting on the layout.
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