My shower wall had a tiny towel rack which was installed with screws. Because of the location, I tended to bang my head on the corner when coming in close to the faucets to adjust the temperature. I took it out. I couldn't leave holes, so I sealed the holes with screws and washers. That is effective in that it keeps the water out of the holes, but I don't like the way it looks. What would be an alternative approach?