👉 The term "filigrained" is a technical term used in the field of mechanical engineering and aerospace design. It refers to a type of surface finish that is achieved by applying fine-grain sand or other materials to the surface of an object, such as a metal part, to create a polished, sheen-like appearance. In the context of aerospace engineering, filigrained surfaces are often used in components like airfoils and wings to improve aerodynamics and reduce drag. They can also be
