"Preparation through education is less costly than learning through tragedy."-- Max Mayfield, Director National Hurricane Center
Something to put your rocket stove in as a windbreak? It may work OK. Wash it out good. Use it in processing your used grease/cooking oil in. It will slowly become seasoned.
My understanding is that the cast iron kettles were only used as a method for keeping some humidity in the house. https://www.hunker.com/13420046/how-to-care-for-a-cast-iron-kettle-humidifier