Cleaning a Copper kettle

[RevA]

Hi,

I just finished Lars Garshol's book on Historic Brewing Techniques and it has got me thinking about brewing in older ways.

I have a 20 gallon copper kettle that has not been used in a while. How do I make it safe to brew in?
I have boiled vinegar in it, and scrubbed it with a copper brush, but it still has a greenish patina, would it be safe to use as is?

 

[Dr_Jeff]

Barkeepers friend will clean it up.

Starsan also works wonders

Brasso, then rinse real good