Let me guess, oxalic acid?
You right Glenn66.It is oxalic acid,hot water,jewelry tools,sandpaper and few different brushes +personal manner and feeling how to do that.
Very nice. Any special treatment for the leather? I've heard some people use lemon juice for cleaning?
Helmet are PACKED IN for good friend of mine in UK.
I,m happy to pass it to his colection!
Thankyou guy,s for all kind coments.
Great find! Looks pretty good, cleaned up nicely.