What are the pros and cons of cast iron vs. porcelain covered steel bathtubs

I am going to give you a very short answer to a very involved topic. Ceramic and porcelain are basically similar products. There are very good and very cheap versions or each product. When you go to your supplier, ask about the hardness rating. Softer cheap tile usually has a redish tint on the back side and is made from softer clay, typically in Mexico. Some of the better grades come from Turkey, Italy etc. and have hardness ratings of 5 or above and have a gray or whiteish back. Most ceramic tiles have a thinner glaze finish than Porcelain. I usually prefer a porcelain glaze on a good hard base in shower and bath applications. Rather than hitting the box stores first, go to a few tile specialty tile stores where a good knowledgeable sales person can give you a good education on the differences. If and when you feel comfortable with your knowledge about tile, find a professional flooring liquidator in your area where you may save anywhere from 40 to 80% on overages, returns or closeouts. I recently purchased 600 sq feet of Turkish porcelain grade 5 commercial tiles for 60 cents a square foot that retailed for over $8 a foot, at a local flooring liquidator. (overages from a hotel job) Huge savings.

I give mixed reviews to tub refinishing. I have had many tubs and surrounds refinished as opposed to replacing the units. Even though a good refinishing job is not cheap, usually around $300-$400, it certainly is less expensive than the labor involved in removing, framing and installing a new tub and surround. I have found a good sub-contractor for these jobs and the difference between a good long lasting job and a so-so job is in the prep. One sub I used years back did not take the time to really clean, sand and prep the surfaces before spraying the epoxy finish, had some problems and call backs within 2 years. I have a few jobs out there over 5 years old now, with no problems or complaints that my current sub has done, and done well. So I guess the moral of the story is, a refinish job can be a good long lasting solution if done properly with good materials. Side note: Don't wait until the original finish is worn to the cast iron. When rust is present, it makes refinishing more difficult and expensive.