heads up! There's little "good information" out there regarding the rehabilitation of a salvaged clawfoot or other cast iron porcelain enamel tub without prof. spraying or DIY attempts at resurfacing. here it is. in detail, with pictures.
Step by step procedure for refinishing a bathtub with Rustoleum Tub and Tile Refinishing Kit. @mittsdad turns an old bath tub into something that looks brand new. http://www.rustoleum.com/product-catalog/consumer-brands/specialty/tub-and-tile-refreshing-kit/