Tommy
Administrator 
Member since January 2013
Posts: 12,980
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Post by Tommy on Dec 20, 2015 16:44:18 GMT -5
I made a badass "natural edges" cabochon from Bull Canyon angel wings and inside the wings was a layer of what looked like gray mud. I soaked the piece in vinegar for over 30 days before brushing it like crazy. Most of the gray dissolved but it has left behind a layer of white in many hard to reach places and it looks like hell.
Without going full-hazmat I'm wondering what kind of acid to try to dissolve away the white stuff.
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Post by captbob on Dec 20, 2015 16:57:35 GMT -5
How about that Lime Away stuff like is used to clean in bathrooms. Supposed to remove calcium build up.
Up from that, maybe Iron Out. Home Depot has it in the plumbing section. Wicked fumes from that stuff, use with extreme caution - read: outside.
ETA: Another Lime Away type product is called CLR
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Fossilman
Cave Dweller 
Member since January 2009
Posts: 20,718 
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Post by Fossilman on Dec 20, 2015 19:14:59 GMT -5
Iron out in an old crock pot-set it outside and let it boil away...
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on Jan 3, 2016 22:26:30 GMT -5
Pics or it aint a thing.  Possible its crappy agate on there? |
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Post by Peruano on Jan 4, 2016 9:05:45 GMT -5
I'm with shotgunner. That white may have been under the grey and not be salt residue from the vinegar(acid) treatment at all, (and may not acid soluble). Personally I often prefer that frosting that agates acquire when exposed to a million years of oxidation. Just guessing - show us the photos (please) so we can guess more intelligently. Tom
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