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Post by stardiamond on May 1, 2021 18:30:05 GMT -5
With Montana a problem needs to be fixed where it occurs; 80 grit scratches need to go back to 80. 280 soft won't solve the problem. I spent a long time on my worn 80 grit, then 220 hard and 280 soft. Using 4x readers and a good light indoors, I see these spots. I ran a pencil over them and no scratches appear but they resemble scratches. I'll go back to the 80 and use a light touch for a while and then move on. I don't like to blame the material. Any suggestions?
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Post by stardiamond on May 2, 2021 12:07:12 GMT -5
I spent some time from 80 to 280 and there wasn't much improvement. I went back to 220 hard and spent some time and there was some improvement. My 280 soft is aging. The 325 soft is newer and the spots were gone. I spent double time on the rest of the sanding and pre-polishing wheels. Cab has a mirror polish that I can't photograph.
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stefan
Cave Dweller
Member since January 2005
Posts: 14,113
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Post by stefan on May 3, 2021 6:41:29 GMT -5
What causes those areas? If they are not scratches then what are they? Just curious as I am going to be getting into some Montana Agate pretty soon.
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Post by stardiamond on May 3, 2021 9:58:44 GMT -5
I think they are scratches. I've also had them on Owyhee.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,723
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Post by Fossilman on May 3, 2021 12:00:36 GMT -5
When I cut pre-forms with Montana's, I work them just a little bit with wheels, than just throw them in a tumbler and let it do the serious work. After all is done, I pick out the stones I want to work and throw the others in a pile.. Nothing worse than trying to remove scratches on material.... Thundereggs are even worse!
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