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Old December 13, 2019, 04:22 PM   #9
tango1niner
Senior Member
 
Join Date: March 5, 2009
Location: NY
Posts: 262
I did hot salt bluing for about 20 years with a set-up and chemicals sold by Heatbath Corporation. The chemical was a Nickel Pentrate salt and actually penetrated the steel about .0005"+ (1/2 a thousanth +). It was not a built up coating on the steel and did not change sizes or dimensions. It was a very durable and lasting finish.

4/0 steel wool will most definitely remove factory bluing.
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