I just found this forum, so I'm a complete newbie.
I have a cast iron dutch oven. I used it last week to boil down a turkey carcass. When I finished and rinsed it, I wiped it with a cloth and the cloth got black. So I decided to do a round of seasoning. I wiped it with coconut oil and put it in a 350 degree oven. After several hours, it still had a brown/black film on the cloth. It isn't forming the 'cured' surface. Not sure why or what to do about it. None of the things I can find on seasoning cast iron cookware mention this. Any ideas?
Western Mass Permaguild