I've a bigger cast iron gluepot simmering nicely in the electrolytic de-ruster. When it's ready, I'd going to black wax the outside, and bitumen the "bain marie" surfaces.
But how to finish the inner pot surface, where the glue goes ? I'd like something that's rustproof and non-reactive, and certainly won't react with the glue. I don't use hide glue often enough that I can merely leave yesterday's glue in it ready for the next day.
Any suggestions ?