Perform Final Sanding and Cleanup

What happens here

Allow the second skim coat to dry completely. Conduct a final light sanding of the entire wall surface using the orbital sander or a hand sander with fine-grit sandpaper (e.g., 180-grit or higher) to achieve a glass-smooth finish. Pay close attention to corners and edges, using a hand sander for precise work. After sanding, wipe down the wall with a damp cloth to remove all dust residue. Carefully remove all painter's tape and drop cloths. The wall should now have a Level 5 finish, perfectly smooth and ready for primer, paint, wallpaper, or decorative finishes like Venetian plaster.

Goal: Once the second coat is dry, perform a final light sanding to eliminate any remaining imperfections, then clean the wall and remove all masking for a ready-to-finish surface.