I'm in the process of building this fire pit made of 4x4 angle iron and rebar. I know I will have to use some kind of hi temperature paint, my questions are what kind of hi temperature paint? There is engine enamel, hi heat flat and fireplace paint. Which one would would be best suited for my purpose? Will I have to cure the paint? I'm sure there will be a few fires that will get hot but most will be mild. Thank you.