A friend from a local woodworking club brought me a piece of sweet gum out of his yard. It's 4-5" thick and 12-14" in diameter. He didn't know for sure how long it had been cut, but it was plenty dry. He wanted to know if there was anything I could do with it. I looked at it and there are several small cracks in what I can see, but nothing major. Is there something I can put on it to fill the cracks and stabilize it while I turn it? I'd like to make a bowl for him out of it, but don't want it flying apart as it starts to get thin. Any suggestions?