As a professional refinisher of tile and a manufacturer of coatings for tile I must stress that oil based paints are not for tile applications. An epoxy coating is waterproof, high gloss and will adhere better to tile then oil based paints and primers. visit www.refinishingonline.com for more information about painting ceramic tiles. Special primers are required that are specific for ceramic tile application and will not peel off in a short period of time like Kilz and oil based paint will. 10 + years can be realized with epoxy based coatings and they can be applied to floor tile in heavy traffic areas.