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Old 08-11-2006, 06:07 AM
mh mh is offline
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Default cast

is there any tricks i need to know to successfully anodize cast. the other day i put a cast piece in my etching bucket and it came out with a black film on it. the only way i could remove it was to re bead blast it. this has happened to me before on parts that wernt cast. if anyone has any ideas on why this happened i would love to know
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Old 08-11-2006, 09:55 AM
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Default Re: cast

That black stuff on The cast is called smut. It is composed of the impurities in the cast as the etch will not react with them.

caswell sells a very nice remover for it.
http://caswellplating.com/kits/aluminum.htm
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