A lot of choices:
http://www.harley-davidson.com/shop/motorcycle-cleaning-products
If you post your question on the Classic Toy Trains forum there may be someone there who knows. I suspect that many people only look at the Trains forums occasionally, if at all.
I tried to sell my two cents worth, but no one would give me a plug nickel for it.
I don't have a leg to stand on.
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