Phil over at S&S Firearms has the 3rd type rear sight and brass band I need for my 1863 Merrill carbine. Maybe I'll find originals, but chances are slim to none. I already emailed Phil about how to age the sight and brass band (plus remove casting material), but no response. Please share your best recommendations on aging these repro parts. Sit the sight in an acetone bath for a day, then a barrel brown solution several coatings and finally warm water with baking soda? No clue what to do with the brass. Thanks, Eric.