The upgrade should be considered a temporary one, and you can’t refinish a fiberglass tub over and over. Old-fashioned porcelain tubs ... enamel paint in the color you need.

Our porcelain ... color, you’ll need Porc-a-fix Prochain Touch-Up Glaze (about $9). There are several ways to help get the color correct, but the best is to know the manufacturer of the tub.