Plaster finish is a type of wall and ceiling finish that is commonly used in interior design. It is made up of two components: STUCCO and gesso. STUCCO is a type of plaster that is made from lime, sand, and water, and is usually applied in three layers. Gesso is a white paint-like substance that is used to give the plaster a smooth finish. Together, these two components create a durable and attractive finish for walls and ceilings.