Patina can be a tricky process and the end result varies depending on weather, humidity etc. Once a piece has gone though the patina process it is sealed with a lacquer. This ensures that the patina will remain unchanged and will not rub off.
To preserve your patina jewelry we recommend you avoid exposure to perfumes, oils, lotions, water and store in dry place. Avoid rubbing vigorously to ensure continued protection of the patina sealant.