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Fail@Lapping - Page 3

post #21 of 23
Flattness is the key in this not shine. From the picture it looks like yours is still concave. You need to keep sanding with an aggressive sandpaper until the whole surface of the block looks evenly scratched. Use something like a mirror or tempered glass as others have suggested instead of plexi.

Then once you are satisfied it is completely flat then move on to lessening the scratches with higher grit sandpaper. A good place to pickup some high grit sandpaper would be an auto paint supplier or a parts store like Napa or Carquest. If they don't have it in stock they can order it for you.

I am not altogether convinced that a perfect mirror finish is at all beneficial. Now you don't want big grooves from really aggressive sandpaper but taking it down to 1500 grit is plenty sufficient.
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CPUMotherboardGraphicsGraphics
4820k EVGA Classified x79 EVGA gtx 980ti SC  EVGA gtx 980ti Classified 
RAMHard DriveCoolingOS
GSkill ripjaws 32 gb samsung 840  custom phase chiller win 10 pro 
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4 of them 3 in surround +1 zboard hawaiian punch rack logitech g502 proteus 
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post #22 of 23
Can I post a picture of my lapping? Not sure if it's good or not, first time going for wc
post #23 of 23
Thread Starter 
just finished my lap... gonna have to suggest to anyone, if you don't have a huge problem, don't do it, this was this biggest pain of anything ive done lol... Found out that the problem was my plexi, and unfortunately on my first attempt i really put a concave on it so it took forever to get it out when I finally got a flat surface...
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