i don't believe in rust proofing...unless you live at the beach than yes. I bought a 4wd last year and first thing i did (since we do a lot of beach/fishing trips) was to take it down to my local 4wd store and ask them to put some rust proofing (fish oil) underneath the car. The owner being totally honest laughed at me and showed me his car, an 80 series cruiser which never had the stuff applied on. He reckons, only a hose down after a drive and you'll be fine. Otherwise the sand will stick to the fishing oil...

Rust proofing works great on mining cars as these are exposed to that sort of enviroment.

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Member of the 18-35 club and proud of it! (For another 5 years...getting old)

New toy has arrived, 1/4 mile in 11.2 sec and only 114hp!