MSW USS Constitution

I have used a combination of ammonia, vinegar and salt to achieve a verdigris finish on larger pieces, but that might be too aggressive for this without diluting.
I saw that one on the internet. I assume the ammonia is used to neutralize the vinegar solution?
 
Not sure of the exact chemistry, but it was all mixed together as a single solution. My assumption was that the acid and base produced some sort of salt compound
Here is what I found in regards to using miracle grow and water:
"The verdigris that Miracle-Gro fertilizer produces on copper is a result of the chemical reaction between copper and the fertilizer. The Miracle-Gro solution contains ammonia, which reacts with the copper to create a patina. This reaction produces a blue-green color, which is the same color as verdigris, one of the original sources of green pigment used in painting. The verdigris formed on the copper is a natural result of the copper's exposure to the Miracle-Gro solution, which mimics the aging process of copper exposed to the elements".
 
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