Mist coat
A very light coat of zinc chromate primer. It is so thin that the metal is still visible, but the primer makes pencil marks easy to see.
Aviation Maintenance Technician Handbook — Airframe, p. G-22
A very light coat of zinc chromate primer. It is so thin that the metal is still visible, but the primer makes pencil marks easy to see.
Aviation Maintenance Technician Handbook — Airframe, p. G-22