5.4 Surface preparation
Parts shall be prepared for EN plating in accordance with the Engineering Drawing,
Purchase Order, and Section 4.1 of this specification. Unless otherwise specified,
substrates to be plated that have rough surface conditions, heat treat scale, or
surface oxidation, shall be mechanically and/or chemically cleaned as required to
achieve a uniform final finish with excellent adhesion. Aqueous cleaning prior to the
EN application cleaning process will follow any surface prep.