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Post by jakesrocks on Dec 30, 2012 17:30:24 GMT -5
Hey Mike, have you tried oxalic acid ?
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jspencer
freely admits to licking rocks
Member since March 2011
Posts: 929
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Post by jspencer on Dec 30, 2012 23:08:33 GMT -5
Could be that the burn marks are deposits from the base steel of the blade? If so then acid should do the trick. If not you may have to rough up the surface with a rough grit sanding. Then put in vibe if they will fit to polish.
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damammy
has rocks in the head
Member since January 2009
Posts: 697
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Post by damammy on Jan 1, 2013 13:19:47 GMT -5
You can try super iron out which you can get from walmart on the cleaning section, I use it on crystals and geodes. Donna
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Post by Bikerrandy on Jan 2, 2013 17:31:42 GMT -5
Burn marks on a slab are usually just surface marks. If you're using them for display, a flat lap will get them out.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,718
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Post by Fossilman on Mar 18, 2014 10:10:07 GMT -5
LOL,old post but will bump it for the information I found on this petwood... This wood was from a deposit in Oregon that had its trees in the swamp area...When these trees started the fossil effect,the chemicals and minerals in swamp water colored most of the wood black-in short,"Mother Nature" strikes again.....
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Post by jakesrocks on Mar 18, 2014 10:30:45 GMT -5
LOL. Mike, I have a whole bucket full of the black and dark brown wood, all slabbed and useless for cabs.
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quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,359
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Post by quartz on Mar 18, 2014 22:55:56 GMT -5
We have a hundred pound plus chunk of that stuff out back, pretty to look at, nice yard debris.
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