I have a cast iron, porecelain coated bathtub and kitchen sink that both need to be either replaced or refinished. With money tight, I am thinking the most economical choice would be the just refinish both of them with refishing kits from the hardware store. I have seen two brands: Homax Tough as Tile, and Rustoleum refinishing kit. I have tried to find reviews on these products with mixed results. I assume if you do it correctly it turns out okay, but I was wondering if any of ya'll out there have used either of these products and have any advice or recommendations. Any help will be much appreciated. I'd hate to waste money and time on something that won't last or doesn't look good. Thanks.