[Jewelry making - Article 00078] - Re: [Orchid] Pre finishing gold casting

[John Donivan]

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>     are the 3m bristle brushes superior can a natural bristle hand
>     brush with polishing compound be used for 

    Joel, if you want a good polished finish on any metal, cast or not,
    there are three steps - file, sand and polish, which has it's own
    steps involved. You're not likely to get a good polish by going from
    filing to a bristle brush - maybe with greystar or something, but
    that's awfully aggressive. The 3m brushes are nice - I don't use them
    a lot, but sometimes. What any jeweler will do is use the right tool
    for the job, so whatever works for you is best. I use what we call
    rubber wheels a lot, so I'm used to it - that's what we call the
    whole family of Cratex and Shofu and similar. Most 18kt is quite
    soft, so you can have problems with faceting, but you can also
    contour a lot on the polisher. In a nutshell, a bristle brush is
    probably not going to get you a good polish from filing, unless
    you're using #6 files. You'll have to work so hard it will probably
    degrade the piece. And the 3m wheels are probably a good choice for
    the sanding - not the only choice, but a good choice. 

http://www.donivanandmaggiora.com
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