Got the bolt jewling finished, not impressed with the Craterex turning at all. Way more precise with a wire brush a double 0 rings with valve grinding compound. That flexing of the craterex tip is totally for the birds on a bolt with multiple humps, bumps, holes and cuts. A steel shaft with shot bristle wire brush does not flex.

I got it to turn out half decent, no blue ribbon job, but decent at 20 feet.

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“To expect defeat is nine-tenths of defeat itself. It becomes a self-fulfilling prophecy. It is best to plan for all eventualities then believe in success, and only cross the failure bridge if you come to it."
Francis Marion - The Swamp Fox