Produces a rich, authentic, old-style brown finish for original or replica firearms. Plum Brown Barrel Finish is ideal for restoring antique guns, muzzle loaders and other metal antiques. A durable, protective and attractive finish that’s simple to apply. Just heat metal with propane torch or other clean, convenient method and apply browning solution with swab. Immediate results – no waiting for old-fashioned slow rust process which can take weeks to finish.