I have a friend who has a HUGE gun collection. He keeps a 20 gallon auto parts washer full of Ballistol. He field strips the firearm, lets the parts sit in the washer for a few minutes, shoots the ballistol through the barrel, and scrubs it with a brush, may lightly brush around the areas as needed and then dries the excess off with an air compressor. It takes him minutes to clean a gun, and while they may not be immacuately clean, they all look and function great. If I had the room, I would do the same thing, although I don't have anywhere close to that number of guns.