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Invest in a set of good jack stands and a good floor jack as your probably will going to be doing a lot of work under the car. Make sure that you only jack the car at the proper jack points (not on the pinch welds). Make sure the car is always on a firm and level surface. If you going to be under the car please think safe. Go after the rust a little area at a time. Get yourself a wire brush and/or a wire wheel for a drill or grinder. Scrub the heave rust off the car and spray the bare metal with an etch primer. The rust that you can't remove paint over with a product that converts rust into primer. http://www.grainger.com/product/2PE1...150407133233:s To be honest it doesn't really convert the rust into primer more that it just seals it and prevents it from getting worse. With any luck you wont have any holes to patch. Always remember Safety, Safety, Safety when jacking the car and support the car with jack stands when you're under it. The last thing anyone want to hear is that the car fell on top of you.