Hobbies and Crafts What is aluminum stucco? What is aluminum stucco? Stucco plate is a lightweight decorative plate embossed in a stucco pattern. It is used for cladding, insulation and panelling and can be brightened or painted. Related Posts:Can you repair stucco on your own?What is the best material for external cladding?What is the most durable timber cladding?Why does my sewing needle keep hitting the plate?