I'm guessing they tape off the areas not getting blasted, but not sure.
I am getting ready to take my 116 barreled action to my local smith and have him bead blast it. The barrel is already bead blasted(Mcgowen), but I'm gonna have him match up the action,bolthandle, baffle, lug, and barrel nut. Spoke to him last week and he said he'd do it while I wait(or shop ::)).
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