Carboy Piggy Bank

[SubVet]

I got a 5 gal carboy fo-free!

Down side is that it held coins in it for the last 25 years.
(I guess the real down side is the coins didn't come with it.)

I was a good do-be and searched for write-up's on the subject. As I suspected, I have already tried everything (and more).

-Hot Water
-PBW, EasyClean, 1Step
-Brush on a stick
-Other oxygen based cleaner
-Baking Soda & Vinegar

There are a couple of spots where the oxidized coins left residue that I just can't seem to remove.
Anyone have any other ideas?
Should I have concerns about scratches inside?

 

[sour_grapes]

I'd go with a stronger acid. Hydrochloric acid (known as muriatic acid) is widely available (pool stores, big-box home centers....)

 

[SubVet]

Thanks, I might give that a try if I break down and want to spend money.

I was sitting there thinking "dang I wish I could sand-blast it" and I came up with an idea.
The carboy was completely dry, so I poured some salt in there and shook it like a mad man. That sucker is heavy, but I got a lot of it off. The salt worked like a sand blaster (or kinda like a rock polisher) and eroded the corrosion deposits.

After rinsing there are still a couple of small spots, so I think I'll try using coke next.

Anyone else have an idea that doesn't involve money?

 

[sour_grapes]

How about combining your salt with your brush on a stick, and spinning the brush with an electric drill?

 

[SubVet]

nice!

I wish I thought of that while I was rolling and shaking that thing around my living room last night, hahaha

 

[dralarms]

That I'd like to see

 

[Julie]

How about filling it with water and oxy-clean, Clorox free, and letting it sit a couple of hours. Fill it to the neck.

 

[Arne]

Next time you put the salt in, add some ice cubes with it. Bunch of ice chips and salt will clean most thing out of your carboy. Arne.

 

[SubVet]

Ok...

I put a few cups of cracked corn in there and agitated the carboy...it worked.

 

[Floandgary]

Glass is funny stuff. Scratches and dings might indicate a weak spot. Careful how you handle it! Plenty of stories here about oops's and close calls..