Drewski
You will have to take the barrel and receiver out of the stock so you can polish all the metal surfaces.
You may even need to take the barrel out of the action, however I have never done this on the rifles I have cold blued.
Here's how Larry Potterfield of Midway USA does it.
Gunsmithing - How to Blue a Rifle Barrel Using Cold Blue Presented by Larry Potterfield of MidwayUSA - YouTube
Cheers
Pete
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