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Old 06-06-2019, 04:20 PM   #1 (permalink)
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Is it possible to repair corrosion/oxidization?

I picked up an older Autococker not too long ago. When I pulled the bolt out I noticed dried,crusty old paint on the bolt and in the top tube. After cleaning with rubbing alcohol it appears that the top tube may be slightly corroded. Is there any way to repair this?
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Old 06-06-2019, 04:34 PM   #2 (permalink)
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Sandpaper/foil/steel wool with WD40 on a dowel would be my first shot.
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Old 06-06-2019, 04:43 PM   #3 (permalink)
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I'd avoid using sandpaper in the top tube I'd worry about removing too much material. To remove aluminum oxides I would first tear down the body and soak in white vinegar. White Vinegar is great for breaking down the oxides and pull them into solution without damaging the anodizing/base metal. Once that is done I would polish the inside with a 12 gauge swab with no abrasives. If you have just minor pitting I'd leave it alone. If you really want to polish the top tube I would work with a Flexhone and Honing oil. You can use metal polish or jewelers rouge on a shotgun swap but may get uneven polishing. When satisfied with condition of the inside of the tube you can just wax it to put some protection on the raw aluminum pits.
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Old 06-06-2019, 04:47 PM   #4 (permalink)
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Does anyone with anodizing knowledge know if it would be possible to have the top tube polished and anodized without stripping the anno on the body?
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Old 06-07-2019, 12:29 PM   #5 (permalink)
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Top tube water and papee towels and a stick. A cotton 12 gauge shotty swab is good. The top tube wont be corroded just gross.

The bolt does corrode and you can polish with a cotton wheel and some compound.
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Old 06-07-2019, 06:40 PM   #6 (permalink)
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Quote:
Originally Posted by Grendel View Post
If you really want to polish the top tube I would work with a Flexhone and Honing oil.
This is definitely the solution, and I had had to do this once before.
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Old 06-07-2019, 08:41 PM   #7 (permalink)
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I've got a swab I cut in half for getting stuff like that off. Chuck it in a drill and go first with soap to get the crud out and then again with polishing compound to shine her back up.
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Old 06-08-2019, 04:35 PM   #8 (permalink)
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Thanks for the recommendations so far. The thing that makes me believe that it will need to be anno'd is that the top tube looks to be raw aluminum.
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Old 06-09-2019, 12:54 AM   #9 (permalink)
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Scotchbrite. You can find it in almost any grocery store, sold as scrubbing/scouring pads. You can also get differing grades commercially, but a box of 50, usually at $1 or more per pad, it's cheaper just to get the scouring pads.
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Old 06-29-2019, 11:52 PM   #10 (permalink)
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I took some photos. Would it be possible to have the internal of the top tube re-anodized without removing the anno on the rest of the body?



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