Nice job on that 686. I'm a fan of polished stainless and have done a few by hand and with a wheel. I've found that ending with a round of Simichrome really brings out the color. Protect it with a coat of Ren wax and cleanups after a trip to the range are pretty effortless.
And in regard to using a Dremel - limit that to the inside of the trigger guard only.
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