text: * Conversion coating
  ** Autophoretic, the registered trade name of a proprietary series of auto-depositing coatings specifically for ferrous metal substrates
  ** Anodising
  ** Chromate conversion coating
  ** Plasma electrolytic oxidation
  ** Phosphate (coating)
  * Ion beam mixing
  * Pickled and oiled, a type of plate steel coating
  * Plating
  ** Electroless plating
  ** nickel plating coating using a different material to preserve mechanical properties
  ** Electroplating