After a lot of trial and error, I think I finally got the finish where I would like it. Appreciate all the tips and suggestions folks offered!
Most of the smaller pieces were relatively easy to finish - applied a few treatments of the Super Blue, dipped in water to stop the reaction, and then polished with light steel wool passes in between.
But with the receiver, I could
not get a uniform finish. And the steel wool would remove the blueing in some areas but not others.
For me, what I found worked best was to dilute the Super Blue with water, and put it in a large enough cup that I could completely submerge the entire receiver.
Afterwards, I buffed the receiver with a cloth rag followed by a microfiber cloth. This seemed to work well.
After I left the piece to sit for a bit, I came back to it and didn’t like how light the finish was. Since the other pieces came out relatively dark, I wanted the receiver to match. So after a few more dips in the Super Blue / water solution (~4 dips that were each ~10 min in duration), I finally achieved the darker finish I had set out for.
Lastly, I applied some of the Birchwood Casey Barricade, which helps prevent rusting. I found this gave the piece a nice overall finish but also emits a scent akin to real firearms, creating a more immersive experience of what a real-world blaster might provide and not just the “look.”
Really excited to have gotten to this step and look forward to start assembling this thing!
Video to follow!
Sean