I have some small porcelain tiles, hexagonal, each approximately the same size as a tennis ball. The tiles have already been hung on the wall, cement board using a tile glue.
I am installing a wall sconce, but the mounting plate for the light has some small bumps on the back. My tiler made the hole slightly to small, so I need to remove an extra 1/4 inch of tile so the mounting plate sits flush.
Looking for recommendation on the best way to enlarge a hole on a tile already mounted on the wall. Pic for reference. Thanks!