The finish is the natural copper that goes through the several life stages of copper from the bright original to a reddish tone to a brownish tone and to the green tone, if left outside.
These are meant to be living sculptures and the changing copper finish is part of that "living".
The sound changes as the velocity of wind changes. From a soft metallic brushing to a fuller "cymbal" tone.
Mother (or father) Nature has her (his) way!
The finish is the natural copper that goes through the several life stages of copper from the bright original to a reddish tone to a brownish tone and to the green tone, if left outside.
These are meant to be living sculptures and the changing copper finish is part of that "living".
The sound changes as the velocity of wind changes. From a soft metallic brushing to a fuller "cymbal" tone.
Chris