We have a cast iron sink with the double drain boards (about five feet long) and would like to incorporate it into a kitchen remodel for an 1860 Victorian home. The finish is very porous and I would like to have it refinished. On the show for the Bronx Brownstone, the process was demonstrated on a claw foot tub. Is this something an "amateur" can do, and if so where would I obtain the materials needed? Thanks for the help!