[Jewelry making - Article 00313] - [Orchid] Sodium bisulfate

[steve_bradshaw]

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    Hello: I have a question regarding sodium bisulfate, I wonder whether
    you can help out. Do you know whether it can be added into a steel
    pin magnetic barreller to help remove firescale? 

    With the 18K alloy we use, we find a hard casting surface which must
    be removed before fine sandpapering is effective - and I'm looking
    for the best way to accomplish this. 

    There are solutions available for this purpose such as "super
    sunsheen descaler" from Rio Grande, but they're not for export (are
    hazardous materials). I need to remove the firescale without removing
    any gold. Pickling alone is insufficient. Thank you.  

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