If your really interested in passivation, it is covered in ASTM A967. Many different methods, but if you realy like your stainless to shine send it out for electro polishing. There a good number of firms that will either passivate or electro polish parts and hardware out there. Passivation does not remove the free iron from the surface of Stainless steel.
C&C 32, Hull #237
Mt. Hope Bay