What is fog coat?

fog coat

Glossary “fog coat” Definition:
Use in metallics. Following a wet coat in which mottling or straking occurs, move the gun back two or three times the normal distance and apply a fog coat with continuing fluid flow and circular motion until the condition is corrected. This technique unifies the metallic and pigment orientation. If necessary in enamels, apply just enough mist-coat solvent to enhance the gloss.