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Old 09-03-2006, 08:47 PM   #1
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Default Rust in bottle

Hi all,
i just got some bottles back from a colleague at work (he was kind enough helping me to empty them of my last batch) and somehow a paper clip made its way into one of the bottles, leaving a nice rust spot at the bottom of the bottle. I searched around the internet a common theme seems to be to use some kind of acid to remove it.
I started at the bottom of the acidity scale and used vinegar. Now the vinegar has been sitting in the bottle for 3 days and the rust spot looks as good as new.
Does anyone have any other ideas I could try?
It's not just a regular bottle, it's one of my 'special' 0.65 L bottles from Germany, otherwise I would have just tossed it.

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Old 09-03-2006, 09:00 PM   #2
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Oxalic acid

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Old 09-03-2006, 09:08 PM   #3
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Where would I look for that? Any commercially availble cleaners that contain oxalic acid?

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Old 09-03-2006, 10:06 PM   #4
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also check a hardware store or some place like that for naval jelly it is jelly that contains phosphoric acid and it'll eat the rust

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Old 09-04-2006, 12:20 AM   #5
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Thanks for the advice guys.

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Old 09-04-2006, 12:26 AM   #6
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Paint stores carry it for bleaching wood. Rhubarb leaves are probably around 0.5% oxalic acid, not that that helps any.

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Old 09-04-2006, 03:13 AM   #7
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Have you tried a bottle brush?

-a.

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Old 09-04-2006, 06:15 AM   #8
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bar keeper's friend? make a paste, drip it to the spot, then remove after a few minutes?

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Old 09-04-2006, 06:47 AM   #9
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You can get oxalic acid (dry powder form) from a darkroom photography chemical supply store. Photographer's Formulary is one such source. http://www.photoformulary.com I don't have a good idea what solution strength you should use, but start with a low concentration.

I bet that standard battery acid (roughly 35% sulfuric acid) should do the trick. Be careful, though. It can burn you quite badly. Get it at an auto parts store.

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Old 09-04-2006, 12:58 PM   #10
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this is one single bottle right? I realize it's kind of special to you and all, but this seems like a lot of work to go through to get the rust off.

Personally, I'd just clean it as best I could with vinegar and a bottle brush and then just use it. Rust won't kill you and the beer will eventually clean it for you.

-walker

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