Bathtub reglazing, also known as bathtub refinishing and bathtub resurfacing, is basically the process by which an old, worn out bathtub is restored to a like new condition by applying a new glaze finish on the surface of the tub. Thus, the names reglazing, refinishing and resurfacing.

 There are several methods and materials used in bathtub reglazing. Many use an acid solution to etch the tub and then spray on an epoxy primer and finally an acrylic topcoat. The problem with this system is that the acid destroys the surface by creating microscopic craters, thus a strong bond cannot be accomplished. Some use a chemical bonding agent (wipe on primer) instead of a spray on epoxy primer. Once again, a weak bond is created. Wipe on primers are recommended for glass only.

The best system to reglaze a tub is: cleaning the surface with a good industrial cleaner, repair surface damage with a waterproof body filler, spray on areospace epoxy primer that does not require etching and finally apply an aerospace  two component alyphatic acrylic urethane topcoat. Automotive primers and topcoat should not be used in bathtub reglazing as they are inferior in quality than aerospace coatings.

The bathtub reglazing process was developed in the 1950's due to the high cost of replacing a bathtub. Replacing a bathtub is not only expensive but it can also be a real hassle. You must deal with the removal of the old bathub, breaking tiles, retiling, you may also have to do some plumbing work as well to replace damaged pipes resulting from the removal process, and of course, connect the new bathtub to the existing plumbing. The expenses to do all this this work can add up to at least a couple of thousands of dollars. And even if you know how to do the work yourself and are willing to go through the hassle, a decent bathtub will cost at least $800.00 to replace. 

A bathtub can be reglazed ( in any color you desire ) right in your bathroom without disturbing the existing tiles, fixtures, or plumbing. The process takes about two to four hours and is ready to use after 24 hours. If the process is done properly, and the bathtub is properly maintained, bathtub reglazing can be an excellent cost effective alternative to replacing an old worn out bathtub.