I've tried lime juice, salt, vinegar, battery acid, and ammonia. Guess which chemical won out? Ammonia. I dipped the pieces into Ammonia, then stood them on end to drain on a spray can lid above the Ammonia and gently sealed the lid on the ice cream tub to let the vapors work.
I'm building a fuel rail for a three deuce Ratrod for my buddy, and Ammonia did the trick to make it petina'ed..
This ad brought to you by the Ammonia producers association, JK...
Antiquing brass and copper.
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Re: Antiquing brass and copper.
Hmm.. Sitting here reading my post, I wonder how ammonia would make a ported head appear unported...
Re: Antiquing brass and copper.
Antiquing copper & it's alloys - as in Verde Patina (i.e. Statue of Liberty)?
Cupric nitrate and heat - apply with a brush when surface temp is above 215*F, repeat as needed to achieve desired hue - too many coats (~>2-3 dozen) can cause seperation of sacrificial coating on flexible substrates... many years of experience with a coloring torch in my younger days.
Nostalgia is dampened by memories of Antique Brown application - the Sulferated Potash required was especially stinky as the water steamed away!
Cupric nitrate and heat - apply with a brush when surface temp is above 215*F, repeat as needed to achieve desired hue - too many coats (~>2-3 dozen) can cause seperation of sacrificial coating on flexible substrates... many years of experience with a coloring torch in my younger days.
Nostalgia is dampened by memories of Antique Brown application - the Sulferated Potash required was especially stinky as the water steamed away!
3 Nails Garage
Sleeps a flock of Rams & a Goat
GUN-HAPPY Crew Chief
Sleeps a flock of Rams & a Goat
GUN-HAPPY Crew Chief