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Mosin-Nagant Metal Finishing
I decided to coat the metalwork with Brownells baking lacquer. This process involves sand blasting, spray painting and baking. Brownells sells quite a few spray-on coatings; I used Teflon/Moly at $27 a can. I wanted to use "baking lacquer" in matte black at $10 a can, but picked up the wrong can. This caused me to run short, so the butt-plate got a gloss black coating.
The barrel extension was 10 or 20 thousandths bigger in diameter than the barrel itself. You have two choices in a case like this, one, you could try to make the joint invisible by carefully turning, filing and blending the joint, or, second, you could do what I did, make the joint extra visible so that it looks like it was intended to be that way J . I went around the joint with a three-corner file so that it was well defined.
This way it looks like it was intended to be a joint. I may even hi-lite it with by filling the serial number, date marking and the joint with some white paint.
The rear sight pin left a groove across the barrel. This was filled with epoxy, but not body putty J , something that got real hard. The excess was filed off and sanded with sandpaper using a shoe shine motion.
All of the miscellaneous metal was mounted on some scrap wood and sandblasted. That sure beats holding every little part. After blasting, these pieces were painted while on the wood.
This is the miscellaneous metal, on wood, in the baking oven. If you want to build one of these ovens see here for some ideas.