Sledge:
The best way to polish open point style varmint bullets is use Hard Red Spring Wheat in a rotary tumbler. Use clean seed wheat and a tumbler like a Sidewinder or Thumblers Tumblers. A vibratory works, but the bullets have a tendency to stay on the bottom. You'll get a nice, semi gloss sheen and no plugged points.
Also a great, non-chemical way to remove moly coating.
Clint.