Prepping - Joint Compound Work
The ceiling in this room was covered with another layer of drywall. There are many jc pops where the screws are. I scraped at one to see what it was about and the plug of jc came out. I'm guessing there's a little air pocket under there? Should I pop the plugs out and refill or is this typical and sanding is enough? (He had said they just needed sanding).