Polishing a bathtub will help it keep its luster and make the tub look clean and well-maintained. Polishing a tub is not hard to do. It is even easier if the bathtub has been kept clean in-between polishes. Vintage bathtubs need to be polished, but only polish the bathtub material. Polish a bathtub every four months for ideal results.
Clean the bathtub using a cleaning sponge or cloth. Wet the tub, spray the cleaner onto the surface, allow it to sit for 10 minutes and then wipe it away. If your tub is particularly dirty, use an appropriate cleaner for the type of debris. Cleaners are available that specialize in problems like rust, soap scum and mildew. For tubs that don't need a lot of scrubbing, use a normal, household cleaner.
Apply a small amount of polish that contains urethane onto your cloth.
Rub the polish into the tub in circles. Make sure to cover the entire surface.
Go over the entire surface again with a clean, dry cloth to rub away any excess polish. You shouldn't be able to see any polish on the tub.