Drywall repair to bad repair job
What is the best way to repair a bad repair job to the drywall? It has been painted but the repaired area needs to be sanded flat since it is too high. I know how to fill low spots but someone filled up bad spot and left too much plaster on the wall (didn't sand down) and then they painted. Shoud I use a palm sander with very course sandpaper on it?