Chasing and repoussé is an ancient metalworking technique that involves hammering metal from the reverse side to create raised designs. The document outlines the process and tools used, potential issues that can arise, safety precautions, and ways to reduce risks. It recommends wearing eye protection, gloves, proper ventilation, and maintaining tools to prevent injuries from splashing pitch, overworking the metal, or hammering knuckles. Chasing and repoussé has uses in jewelry making and other metal arts.