Walnut and corncob are both excellent. But remember if you mix in a polishing agent like rouge or CrO, these are metal abrasives.
Clean your polished brass for 15 minutes in untreated walnut or corncob to clean the polishing agent off.
History fails to record a single precedent in which nations subject to moral decay have not passed into political and economic decline. There has been either a spiritual awakening to overcome the moral lapse, or a progressive deterioration leading to ultimate national disaster.
If you think a strong military is expensive, think about what a weak one would cost