Paint tiles using latex paint or two-part epoxy paint. If latex paint is used, two coats of bonding primer must be used. The bonding primer must be rated for use on tile. Allow bonding primer to dry thoroughly, then apply two top coats of latex wall paint.
Paint tiles by first thoroughly cleaning, sanding and removing the sanding debris. Clean the tiles using an abrasive bathroom cleaning to remove mildew and soap scum build up. After cleaning, wipe the surface thoroughly with a wet sponge to remove residue, and allow the surface to dry. Sand the surface with fine grit paper until gloss is removed. Electric palm sanders sand the surface quickly and are preferred over hand-sanding. Remove the sanding debris with a wet cloth.