Great job! I would have never considered the epoxy for that purpose, but it works! By the way, is your upper concrete ledge tapered towards the drain? If not, pay close attention to details to avoid water leakage/mold/etc.
Good question...I will have to check on the ledge and make sure water is not going to run away from the drain and into the sill.
Unfortunately, the concrete finishers were given incorrect instructions and did not finish this as the final product (they were told a shower pan would be installed). I spent a lot of time smoothing all the edges and corners before painting, and I will need to put down some caulk around the bottom edge of the wall.
You sound similar to my wife. She has tiled floors, walls, kitchen counters, ceramic flower pots, jewelry boxes, patio tables, pictures, and the tops of end tables. I'm afraid if I sleep too soundly, I will wake up with tile underware, if you know what I mean!