Plaster techniques involve various methods used to apply plaster for construction and artistic purposes. Common techniques include troweling, where a flat tool is used to spread plaster smoothly, and casting, which involves pouring plaster into molds to create shapes. These methods can be used for both structural elements, like walls and ceilings, and decorative features, such as ornamental cornices. Another popular technique is stucco, a mixture of plaster, sand, and water applied to exterior walls for texture and durability. Additionally, faux finishing techniques can create the appearance of materials like marble or wood using plaster. Each technique offers unique aesthetic and functional benefits.