Porcelain enamel is an attractive, durable bathtub surface, but it can chip. You can repair a chipped porcelain tub yourself with a few easily accessible materials. When the chip is in silicon Chipped area that is always dry, such as the outer surface of the tub, a single repair should do the job. However, the damage can need repeated repair when the chip is in the basin of the tub. 1Dry the chipped area thoroughly with a hairdryer. The surface must be completely dry so that the repair compound can stick. 2Sand the chipped area with 220-grit sandpaper until the edges are smooth. To avoid scratches on...