Remove oily flux after soldering and you'll prevent discoloring and oxidation that may occur with time. Just squeeze on flux remover, wipe with a damp sponge, rinse, and dry thoroughly. Flux remover is absolutely safe to use: non-toxic, non-abrasive, non-flammable and water soluble. You'll find your patinas turn out more uniform when you use CJ's.
Shake before using. Apply CJ's directly to finished piece immediately after soldering. Scrub entire piece (glass, lead, solder joints) with soft brush and warm water, then rinse clean. If using a patina, apply now and rinse again.