I Need A Chemical To Turn Patina Copper Back To Bright Penny Color

I need A Chemical To Turn Patina Copper Back To Bright Penny Color for a customer that I just delivered a proposal to today.

They have a few special requests and a big honking job to look forward to, so I would like to find out what to spray or wipe on the bay window roof, standing seam Copper Metal Panels to bring back that original shiny luster.

What can I use and where can I purchase it?

Ed >>>

OOOOps lads, gotta go , Ole jack thinks he hears some sireens gettin closer.Arrrrrrrrrrrrrr>>>

Arrrr, well shiver me monays ther, we says. Ahoy ther Mister Ed, pee on it, ole jack figgered it out one day when standin behind one of me vic........er.......customers chimalys ther we did for shure. Ole jack whipped out me alligator for a quick relief, an was apeein behind tha ole chimaly that was flashed with tha fancy copper, thayt stuff started shinin like a new penny in no time.ar ar ar ar ar ar ar ar,Shur do miss me little pirate econies ther , we do for shure.>>>

Tarn-x wont work on heavy green copper roofs. It wont do anything at to it. So don't waste your money. You will never get it to go brite shinny like new because it has been etched by acid rain and the patina goes into the pours. A lot of elbow grease is what it will take with steel wool and maybe some tomato juice to help loosen it up. I know there are some strong chemicals out there that will clean it up but off hand I can't remember the name. You have to be real careful with it though.>>>