Greetings: I have seen various threads which talk about the insulation value of wood ash, specifically about how long glowing coals can stay hot in a pail of ash. Has anyone ever used wood ash to construct a safe. I have access to a stainless steel 5 gallon pail with a lid. I am thinking of hanging a suitable metal container inside the pail, about halfway down and then filling the pail with wood ash and crimping the lid on. Any suggestions out there?