I cleaned the barrel electrostaticly I inserted a 1/4" steel rod with small pieces of tubing on it down the barrel. The tubing keeps it from contacting the barrel and shorting. Connect the negative cable to the barrel and positive to the rod, submerge in tub of water and washing soda and turn on the battery charger.
This process produces hydrogen, so I propped the end of the barrel up so the bubbles would come out. After a few hours and some cleaning of the steel rod, I finished cleaning it up with a regular gun cleaning kit.
Reblued the parts that had rusted and finished
The hammer was rusty so I cleaned it the same way
I cannot wait to shoot it!