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Old October 30, 2010, 08:12 PM   #2
Bill DeShivs
Senior Member
 
Join Date: April 7, 2006
Posts: 10,978
Nitriding, in one of it's many forms is the most durable.
Industrial hard chrome would be second.
Electroless nickel third.
All of the items you posted would be way down the list.
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