This recommended practice provides recommendations concerning the chemical milling of aluminum@ magnesium@ and titanium alloys@ and specialty alloys. The detailed recommendations are based on practical engineering and production experience that will enable industry to make proper use of the chemical milling process. Safety - Hazardous Materials: While the materials@ methods@ applications@ and processes described or referenced in this specification may involve the use of hazardous materials@ this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.