As an alternative to the typical chrome or nickel plate , armoloy seems superior and offers a nice even coating which likely is more durable on the sliding parts
I have one luger armoloy coated - was that way when acquired - and is to me excellent appearance and sort of like a satin chrome - apparently not much polishing was required as markings appear almost original
I have no association with this linked entity ( just used search "armoloy firearms" )
http://www.armoloyftworth.com/Armolo...plications.htm
good luck with your project
Bill