When it comes to renovating or repairing walls, "plaster over" is a common term that refers to covering up the old layer of plaster or drywall with a fresh coat of material. There are several synonyms for this phrase, including "skim coat," "surface coat," and "finishing layer." Other similar expressions include "mud over," "joint compound over," "tape over," or simply "patch up." No matter which term you use, the goal is the same - to create a smooth, seamless surface for painting or wallpapering. By plastering over damaged or outdated walls, you can refresh your interior space and give it a whole new look and feel.