looking to change color of the tile in the bathroom.What type of paint,technique and(or)water seal(if needed)do i use? The tiles and the grout are in good shape.This is a first attempt at a project like this,however I'd like to get it right and not have to do it again for a while.It would be much appreciated if anyone can help me get started by listing the supplies that are needed.TTTTHHHHAAAANNNNKKKKKSSSSSSS......