That old-fashioned cast-iron tub in the guest bath sure is impressive—unless your antique soaker's exterior has taken a beating over the years. You can refresh an old tub (or just introduce an unexpected splash of color) with an affordable can of paint. While reglazing the interior's porcelain is a project best left to the pros, you can easily refinish the outside of your tub in less than a day.
1. Scrub the surface with a stiff wire brush, removing any flaking paint.
2. Using a natural-bristle brush or 4-inch foam roller, apply an oil-based primer formulated for metal. Let dry 6 to 8 hours, and brush on a bright, oil-based enamel or epoxy. (Avoid latex paint, as it can cause your tub to rust.)
3. If a second coat is needed, wait 24 hours before applying. Then get set to soak in your bathing beauty.