I bought this beautiful terrarium today at an antique store as a 'present' for myself for my 50th birthday which was yesterday. I have never had one and I really want to use this piece outside down between our creek and koi pond. I am wondering if anyone else has experience with an outdoor terrarium? It is painted and has glass glued in place with sillicone glue. But I dont' know if I would need to re-paint with Rustoleum or otherwise treat it to prevent as much rust as possible? Any advice is apprecaited!