How to paint over floor tiles in the kitchen?

Prepare Tile. In order for paint to stick to ceramic, you must prepare the kitchen tile before picking up a brush. ... Once the tile is clean, sand it. Ceramic tile has a glossy finish that doesn't grab hold of paint well; sanding the surface creates texture that makes it easier for the paint to adhere. Use a good gripping primer. The grout color can be changed with Mapei Grout Refresh. They sell it on Amazon and in Floor and decor. The grout refresh does not need sealing as it has a sealer built in. Works great. A little tedious but not hard. Use and artist brush to apply.

Thank you for the advice that is helpful for me also.

Rent an electric sander if you don’t have one. Sand all the tiles to make the tiles rough enough to hold the paint. Bleach out the grout lines. Paint the whole floor including the grout a white primer. That should be enough with the white-gray you are starting with. Start with tiles in one corner. Paint one tile at a time, using a cardboard sheet or a ruler to keep the new color off the grout lines. Continue, painting one section at a time. If one coat is enough, let it dry a day if you can with no one walking on the floor. Then add one or more coats of a clear paint sealer, like polyurethane. Let that dry, then you are finished. When you are ready to clean the floor the next time, use something like Mr. Clean floor cleaner, NOT a floor stripper. Keep it clean for longer service, including spills like grape juice or Kool Aid. Best wishes, Denise. ☺️