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Would I have to make a lap and selectively grind/polish it flat?
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I persevered and changed to 400 grit. Went through a whole cycle with the four disks and finally have some success.
What was wrong with the 600 grit, nothing, I used more water to dilute it and it worked, but slowly. Wanted all the shine off and I am nearly there. One more cycle with the 400 and I start the 600 cycle again.
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