Finishing the inside walls and ceiling of a room with drywall is a multi-stage process that will require you to apply coat after coat of compound to cover every joint left behind where large drywall boards were butted against each other to create uniform and flat surfaces all over the room. This is done with the use of a handful of specialized tools and materials to spread the compound over the joints, spreading it wider every time you return to it to finally achieve a perfect uniformity on an even drywall surface that can then be coated with primer and paint.
