And as a second to the idea of not using a flex hone, most you will find will probably to large a ball media which will not be conducive to getting into the threads. Steel wool is a much better idea. And very little at that. Consider it a cleaning and then lubricate. And anti-seize compound might be a good idea too unless there is great opposition from the bike folks here. And I think the o-ring idea is a good one too.