I don't know about wet polishing but after tumbling with a liquid polish in corncob I tumble in clean corn cob with a pinch or two of paste wax scrapings. Removes any remaining polish and adds a very thin layer of wax to prevent tarnishing. I suppose it leaves a layer of wax inside the neck too. Never noticed a cold bonding condition anyway.

And my ammo stays pretty. wink

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.