Suzuki Samurai - Rustproofing and Undercoat

Rustproofing a car, jeep or truck is actually an ongoing process. It's work and it's too time consuming to do everything at once. You are better off doing things in steps at the same time you wash your car. For any exposed metal on the underside or any place that can be thoroughly cleaned and painted, it is far better to use a high zinc primer and a high quality chip resistant paint, than to spray on some oil that will wash off fast. The paint used for mag wheels (spray cans) is pretty good stuff, but truck bed liner is probably the strongest paint you can get in a spray can. Buying truck bed liner in spray cans is more expensive, but it allows you spray inside areas that are hard to reach with a brush, plus you can easier use a spray can anytime without having to clean spray guns. Killing rust on a car, truck or jeep is on-going so it's better to just do things in sections. For the inside of rockers, doors and quarter-panels, I like to use a high quality spray automotive wax and a little WD40. I like spray liquid automotive wax the best for rustproofing inside panels, because it is totally harmless to paint. Some people use various oils, but they can soften the paint after a while. You want something that slows down rust a lot and also is totally harmless to paint.