Can U Paint Porcelain Floor Tile. It's not made to be used inside showers or on countertops. Prolonged exposure to moisture, for example, will cause paint to peel away from the tile over time. This paint is made to stick to tile.
Use 180 to 200 grit sandpaper and remove as much shine from the tiles as you can. Therefore, you can definitely paint floor tiles as well as tiles on the walls and backsplashes. I painted our floor tile in the same way as i primed it, using a paint brush on the edges and on the grout and rollering the rest as i went (as with the primer, i used a 1/4 inch mini roller like {these}):
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Sanding or dulling is recommended on glossy, extremely hard surfaces for maximum adhesion. It just won't hold up. We just replaced the vanity with a newer up to date sink. Ceramic is probably the best contender, but it must be prepped correctly, says watson.