I've got a photo shoot of our brewery coming up next week with our local paper. I thought it would be nice to shine up the tanks-so I buy this copper shine product (probably a strong acid buffered with a salt). Our kitchen guys have used it with great success on their copper display platters. Anyway, I gave it a shot. It looked like it was doing the trick at first, but now, the tanks turned a murky, blackish-greenish, creature from the black lagoonish color. They look 100x worse than they did before I started!
What can I do to fix this? I tried wetting it down and wiping it off, using diluted nitric acid on a sponge, nothing seems to fix it. I have until Monday to make it look good, if not good, at least restored to it's old mediocre condition. Please share the wisdom,, and if you can, explain what went wrong here. I'm at a loss.
![Mad](https://discussions.probrewer.com/core/images/smilies/mad.png)
![Confused](https://discussions.probrewer.com/core/images/smilies/confused.png)
![Mad](https://discussions.probrewer.com/core/images/smilies/mad.png)
![Confused](https://discussions.probrewer.com/core/images/smilies/confused.png)
What can I do to fix this? I tried wetting it down and wiping it off, using diluted nitric acid on a sponge, nothing seems to fix it. I have until Monday to make it look good, if not good, at least restored to it's old mediocre condition. Please share the wisdom,, and if you can, explain what went wrong here. I'm at a loss.
![Confused](https://discussions.probrewer.com/core/images/smilies/confused.png)
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