Here is a neat product that has great reviews and you can get a free sample as well. It is called Fluid Film. Fluid Film is formulated from specially processed wool-wax, highly refined petroleum oils and selected agents to provide corrosion control, penetration, metal wetting and water displacement. These long lasting products contain no solvents, will not dry out and will penetrate to the base of all metals, providing corrosion protection from both natural and industrial atmospheres. It is sold at all John Deere dealers and others.
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For a sample send an email request for it to '
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I am waiting for my sample now. I am going to undercaot my truck with this stuff for winter protection. Do search on the web you can find it on You tube and several other forum discussions. Give a try, I am.