How do you finish the jimping after heat treat?

P

PMQ

Joined
Feb 17, 2020
Messages
176
I've seen a lot of guys use checkering file to make jimpings, this must be done before the heat treat. How do you finish the grooves of the jimping after heat treat? I don't think using a checkering file on hardened steel is a good idea.
 
I have been using abrasive cords and wrapping abrasive paper around a suitably sized backer.
 
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