Take a look at this web site....http://integritycoatings.com/..... They give some pretty good information on what you have to do to paint ceramoc tile or bath tubs....as you can see it is not a easy job.. You probably have a professional tub refinisher in your area...although they charge about $7-$9 a square foot to re-color tile. I t might be woth it to have them come do it...or you might just p/u some stuff called "Klenks" which you can brush on , but it will not look as good or last as long