There is a natural aging process to our standard finish of antique copper, and the environment has an impact of how quickly that happens.
Our standard finish is antique copper. This is a living finish, which means that it naturally develops a beautiful patina over time when left to age (approximately 2 to 3 years). It first turns a reddish brown, then brown, darker brown, and eventually is almost black. Over 20 years or so, it will develop to green.
The environment has a lot to do with this aging process - dry, cool areas age slower than hot and humid areas.
To slow this process, rub an oil-based product (we recommend WD-40, but motor oil or cooking oil can also do the trick) with a rag.
With proper maintenance, your lantern will last a lifetime!