Here's a site that has some good info on basic materials and techniques. You can get a book from the library or buy one at an auto parts store. Spencer Yost also has a good book,"The Antiques Tractor Bible," that covers basic body repair on tractors. First thing is to get the old finish off(sanding, stripping, or sandblasting)and evaluate the amount of damage by rust and dents. Rust should be removed or neutralized before refinishing, or else it will continue to grow. Then it's a matter of using new material(epoxy, polyester/fiberglass, welding, new metal, etc) to replace missing metal and heat and bumping with body hammers and dollies to re-contour bent or dented areas. Then comes filling pits and minor flaws, priming, sanding, painting, and buffing. Prep work is way more difficult and time-consuming than painting, and the better your prep, the better the final product. Very tiny flaws are magnified when sprayed with new shiny paint.
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