Clean tile with dawn dish soap.
Wipe dry.
Use extra-fine sandpaper to scuff up the tile.
Wipe away dust.
Tape out areas you don't want painted and cover counters with cardboard, drop cloth, or butcher paper.
Optional: Use Press and Seal to protect the faucet handle.
Wipe down tiles with deglosser.
Use a paintbrush to paint grout lines and a small foam roller with primer. Make sure to wipe away any drips that are occurring when painting before it dries.
Let dry (read instructions on paint cans for your dry time).
Repeat with Urethane Trim Enamel paint in the color of your choice.
Paint at least 2 coats with proper dry time in between.
Remove painter's tape and clean up any areas.