Vapor blasting is a process that was developed during the second world war. It was initially used in industry to create surface tension in parts to strengthen them. Rolls Royce used it to strengthen turbine blades before assembly into jet engines.  

​The process uses water, micro beads, mild cleaning agents, and air. These components are mixed into a slurry and propelled at high speed toward the surface of a metal part, such as aluminum, brass, as well as mild steel. It seals the surface, resulting in cosmetic enhancement and imparts a micro finish that helps it resist further staining and oxidation.