I'm still a fan of plain old Boiled Linseed Oil for a retro looking finish.
On this Cimarron/Uberti replica of a Colt 1971-1972 Open Top I stripped the original thick glossy finish with paint remover and rubbed in boiled linseed oil each day for a week.
It wasn't like I was in a hurry to carry it concealed or anything.
Same finish here on my .30-40 Krag...Boiled Linseed Oil. Get a scratch? Rub some more in.