Not that I am trying to use it, but all the discussions about toxic materials reminded me of my own experience. It was around 2000-2003, when I had only one bird, my cockatiel, Cherry. We lived in a small house with kitchen, dining area and "family room" all basically in one room. Cherry was in the area when my ex-H decided to bake Polymar clay items in oven for his hobby (making scenery for a game using miniatures) . I was sitting on the couch next to Cherry's cage when I started to smell something. As soon as I noticed the smell, I looked Cherry, and I saw him gasping for air. I immediately removed him from the area and he was O.K. (he lived to be 21+ years old. He passed away in 2016 ), but I still wonder if he survived if I did not remove him from the area right away. Just wanted to mention this. For me if it is not "true to tried" to be safe items (cast iron, aluminum, ceramic, glass, etc), don't put in the oven!