>Green-Blue Patina >1. Fill a sealable plastic container with either sawdust or tobacco. >2. Add enough of the following solution, one part vinegar to three parts household ammonia, to just dampen your sawdust. >3. Clean your copper by annealing, pickling, and running under water. Let dry. >4. Place the copper in the sawdust mixture and cover completely. Seal the container and leave for at least one hour to several days until the desire finish is reached.