The black bar is emory and it will be used to do most of the initial polishing using a cut motion(against the spin) then a color motion (with the spin). Once it is polished out, switch to the brown to get the part brighter. Put it on the wheel by running the wheel and putting the bar up against the wheel for a second or two. You don't need alot on the wheel, but you will need to put it on often. I suggest you download and read the free buffing and polishing manual on the Caswell site, then practic, practic, practic and bone up on patience you will need alot of it.
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