I am in the midst of a kitchen renovation. I needed to install some new switches on an interior partial wall that is made of brick covered with plaster, so my electrician used a sawzall with a chisel head to cut a groove for the switch box. A little overzealous, he went right through the wall, which is about 4 inches thick. I now have a very uneven hole, roughly 6 inches in diameter, in the wall with a switch box screwed in to one side. I'd love any ideas on how to patch this.