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Hi Dan, Rust can removed with soaking in vinegar. Turns rust to black oxides then can be whiped away then a oil finish can be used. Depends on how deep the rust penetrated the surface determines the steps required to take the metal to the desired finished condition. Any type of "buffing" is just a form of metal finishing and uses a grit compound to accomplish such. Each down size of grit increases the metal finish to a mirror like finish. So if the metal was lightly pitted from rust then you can start with a 400 grit and jump up in 200 grit steps until the desired finish is obtained. If you use a 10x maginfier then you can see just how ruff the surface is to begin with. The end view surface will look just like this ^^^^^^^^^ with each point ridge slightly lower as the surface becomes towards mirror like using a buffing compound. Is what your actually doing is thinning the surface ridges to a very fine point to where they can be layed over on top of each other thus appear as very smooth surface to the naked eye and is why you always want to buff in the same direction until the desired finish is obtained. A typical mirror finish is obtained with a leather buffing pad using a rouge compound suitable to the type of metal being finished, approx 1200 grit on carbon steel using red rouge. T_Bone
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