Composites comprise two materials, such as a metallic mesh and a resin, the combination of which also depends on the properties required. Materials from which the item is to be manufactured are noted on the engineering drawing using standard material and grade codes. It is important that manufacturers do not interchange materials because the switch may make the products susceptible to failures.
Tarring and feathering is a physical punishment, used to enforce unofficial justice or revenge. It was used in feudal Europe and its colonies in the early modern period, as well as the early American frontier, mostly as a type of mob vengeance (compare Lynch law).
Tarnish is a surface phenomenon that is self-limiting, unlike rust. Only the top few layers of the metal react, and the layer of tarnish seals and protects the underlying layers from reacting. Tarnish actually preserves the underlying metal in outdoor use, and in this form is called patina. The formation of patina is necessary in applications such as copper roofing, and outdoor copper, bronze, and brass statues and fittings. Patina is the name given to tarnish on copper based metals.