A Hoppe's bottle full of Murphy's Oil Soap added to a quart of Ed's Red will enable it to form a stable emulsion in water. You then have a pink solution similar in consistency to Pepto Bismol which works on chlorate primed ammo and black powder. The lanolin in the Ed's Red leaves a protective film on the metal to positively prevent rusting until the water evaporates. Standing the cleaned gun near the wood stove at the hunting camp finishes the job. Or at home discreetly borrow the hair dryer from SWMBO.