Cover seams and fasteners with joint compound
Apply paper or mesh tape over seams
Embed tape in a thin layer of compound
Let the first coat dry completely
Apply a second wider coat of compound
Let the second coat dry completely
Apply a third finishing coat if needed
Feather edges wider with each coat
Fill screw holes and dents with compound
Sand smooth after each coat dries
Use a sanding sponge or pole sander
Remove dust between coats
Check for ridges, bubbles, and imperfections
Touch up problem areas with compound
Sand the final coat lightly
Wipe down the surface before priming
Apply drywall primer before painting