Repairing the Laundry Room Ceiling (3)

This was one of the three holes the contractors cut into my ceiling for shits and giggles. They ended up cutting into my sisters walls to do what they had to do, since they couldn't reach through my ceiling. WTF, right?!

One last layer of compound with plaster of paris did it. It's all smoothed out and looks fine. I guess I have to paint this room now to make that square go away. Crap.