You're getting some pretty good advice here. For blacking, Johnsons Barrel Browners (I think barrel browner above might be associated with them) is the best in the British trade. They know the business, and I agree with his recommendation. St. Ledger's occupies the same position in the trade for case-hardening. The reddish tint in the wood finish (alkanet root) is correct for the gun.
Given our discussion of this gun, I think you can spend money without improving its value, and I don't think you can improve it's looks. It's a grand looker of superb quality. Leave it alone and enjoy it.
