Thanks, man. I got the sheets here
http://www.vandykes.com/aged-solid-c...eets/p/203845/ I guess they take some copper sheets and bury them for a while and it comes out all oxidized and crazy looking. They were super thin, like 1/32 - 1/64", and were actually kind of a bitch to work with cause they were so thin that you had to be really careful to keep the sheets flat or else they'd get wrinkles in them. I didn't do any thing to seal them and they really haven't changed too much since I built this roughly five years ago.