I have made a large cauldron out of a utility bucket, cardboard ribs and duct tape like many other on this site have. The other day I put on the first layer of mâché. Everything went on great. I used stolloween's recipe from his site. 6cups flour, 1cup liquid starch, 1cup white glue and water. After it was done, and it had dried to dampness, I put it on a high shelf. When I came back today, it had cracked and split very badly. In fact, I have to completely remove this layer and start anew. Now in the garage, where the cauldron was stored, there are 2 large heaters that keep it warm and it's quite hot by the ceiling, but no direct air was on the cauldron. Do you think this heat caused my splitting? I have never had this happen before.
TIA for any help provided!
TIA for any help provided!