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Old 09-10-2014 | 06:51 AM
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Take a piece of sheet aluminum, and "mike" it with a micrometer. Let's say it is .032". Then start sanding it as vigorously as you can with 400 sandpaper. Then "mike" it again. You won't even take off 1/2 a thousandth of an inch. (.0005") Chrome, nickel or Nikasil is many times harder than the aluminum.

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