Egg and Dart Medium Shanko Tin Cornice 3.5 in. Wide 4 ft. Long - #803 Cone Head Nails are available in all Finishes.STEEL cornice come UNFINISHED, and need to be treated with an OIL BASED paint. For best results use a semi-gloss or high-gloss paint to prevent rusting or tarnishing. To leave STEEL panels in natural state, use clear glossy enamel by Rustoleum.