Bathtub relining is a lower cost alternative to replacing the existing bathtub. A special liner designed to fit in and around your existing bathtub and is glued over the existing tub. The drain is reconnected, sandwiching the liner in the middle of the seals. These liners have been around a number of years and the technology has improved as has the installation. Individuals must decide for themselves if installation of a liner is a good idea. Provided the installation was done well, the liner should work just fine.