This 1-2-3 Aerosol Value Pack from Birchwood Casey is gun cleaning made simple. It takes just 3 easy steps to clean your firearm: dissolve, clean and protect. First, use Bore Scrubber to dissolve copper fouling and residue left behind from firing your firearm. Second, clean out the dissolved material with Gun Scrubber. And, third, cover with Barricade to protect your firearm from rusting.