Skim coating is a great way to make old walls and ceilings look new again! It involves applying a thin layer of diluted joint compound using simple tools like a paint roller or spray rig, then smoothing it out with a drywall knife or trowel. This method creates flat and even surfaces, perfect for painting or adding texture. Applying at least two skim coats ensures a smooth finish. Below, find out why skim coating your walls or ceiling is a smart choice.