Redoing a patina onto a mixed metal fountain

I am a landscape contractor working on a small sculptured fountain. It is manufactured out of an aluminum bowl with several copper tubes and .5" steel tubing. The entire piece looked like it was copper because it had a semi-turquiose /copper patina on it until I started to repair it.

Now that I have repaired the fountain I need to replace this patina but I don't know what to use? Since there are three different materials and yet it all has the same patina I am not sure how to age it and redo this great looking copper colored, green speckled, turquiose color onto the surface to regain the patina. Perhaps I just redo the entire piece but still, what do I use?

I will also be using this in a tropical, high humidity climate; how can I arrest the corrosion and rust destroying this fountain? Your help will be greatly appreciated.

I think it's very unlikely that this 'patina' was anything other than paint. Look for Rustoleum American Accents [affil link] fancy paints; Krylon and their other competitors probably have similar lines.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

On re-patina , I use epoxy metal coatings with catalyst and hardeners that will take a real patina chemical to get anything you would like, I have used these on all types of commercial projects interior and exterior, they hold up well under just about any condition.
I buy these products from Sculpt Nouveau.
Thanks Rick H.
P.S. Using the copper coating would make the fountain uniform so you don't have to worry the dis-similar metals,Take the patina evenly and protect the piece.