I used the "Norton White Tile Method", but ended up just mixing some water with PVA glue, then adding Ti02 powder until i couldn't stand it anymore.
I started with this recipe
But found it needed more (about +50%) Ti02 powder and a good mixing.
I've tried the spray paint (Rustoleum white "2X" primer) and it worked great on plexy, but haven't tried it on tile. There is also a very $$ spray paint but I'm a cheap bastid.
Good thing about the PVA glue method is it washes off with water (no solvents)
