I'll second the anti-freeze and water. A few squirts down the barrels, wait a couple minutes, and then push out the residue with a paper towel on a jag. Residue comes out in ribbons. Clean up from there is easy.

I ought to add looking at my BP guns again after a few days. Shot my Parker Lifter with BP Friday cleaned same day wiped it down again Sat. Stood it up against my desk. Monday went to put it away tiny little bit of surface rust around the muzzles were I handled the gun. It has almost no finish on the outside of the barrels to protect it.

Wiped down again came clean. Then I de-oiled the outside with lighter fluid let it dry and waxed the barrels. Plain old paste wax. Paste Wax is what many museums used to preserve metal objects. As a rule Blued barrels don't need this step.

Bill

Thanks for the tip on the light film of paste wax.

yes this is a very good tip...thank you...charlie