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Old 11-07-2006, 10:55 PM   #1 (permalink)
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Anodzing questions

What chemical is used to desmut aluminum? The desmut from caswellplating costs alot, and it would be great to find a cheaper place to get it.

When I used to anodize, I would just put the part in very hot water to seal it. Does this work as well as the sealant that caswell sells?
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Old 11-07-2006, 11:33 PM   #2 (permalink)
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The desmut from Caswell is a combination of sulphuric, formic and some other (maybe muriatic ?) acid if I remember the packaging correctly.
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Old 11-07-2006, 11:37 PM   #3 (permalink)
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Unfortunately caswell doesn't list the chemical in the container. I believe someone once told me this would:

But I don't know if it would really be worth it.

Caswell gives you one quart with mixing instruction for 18 dollars. Radio Shack give you half that at an unknown concentration for $5. You could experiment, but there are no real garantees.

Of course for That price, I am not sure you care too much. (If I rember right it was 3 gallons of water with the one quart of Desmut (don't quote me on this my manual is over 40 miles away in my parents garage.)
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