Thanks for the warm welcome!
We'll we're off and running on the DL-44 project.
First step was disassembling the Denix. There are a few videos on YouTube that go through the disassembly, which I found helpful, and probably saved me some time trying to guess it out.
I've learned with other projects that bagging all the parts, and tagging those that aren't immediately identifiable will save vast amounts of time when you finally get around to putting it back together!
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I couldn't figure out how to remove the bolt from the upper receiver, and couldn't find any reference online. None of the videos I found included removing the bolt. It appears the "firing pin" is pressed/soldered/threaded into the bolt and then ground flush, and without removing that, the locking block on the side cannot be removed. If anyone has successfully removed the bolt from a Denix, please chime in...
I was also missing the screw under the barrel that holds the upper and lower receiver together. From experimentation with my metric die set, it appears to be a 3mm with a .6 thread pitch, which is much less common than the 3mm/.5. I'll have to search one of those out before reassembly time.
My paint stripper didn't even touch the finish on the barrel... It's pretty old, so I'll pick up a new can and try again. In the meantime, I sanded the front part of the barrel (the part that will be hidden by the flash hider when mounted) so I can experiment with finishes. After reading other threads here, I'll probably go with BC Super Blue, but I want to see how it works on a smaller area first. The 'as cast' finish on the Denix is pretty bad... took a bit of work to get it smooth. I started with 220 and worked up to 1500 grit paper.
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I'm going to try that and see if it gives the desired look. If not, more polishing may be required.
I also hit the inside of the flash hider with aluminum black. Gives a good 'carbon scoring' look...
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Weathering on the flash hider will be interesting to get it right...
BTW, if you're getting older like me, sometimes reading glasses don't really cut it when working on small stuff. I have one of those big lighted ring magnifiers on one of my workbenches, but I picked up one of these and really like it:
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Much better than the old machinist's hoods, and ~$15 on Amazon:
https://www.amazon.com/Lighted-Magnifying-Magnifier-Headband-Electronics/dp/B06XWVJVKN/ref=sr_1_5_a_it?ie=UTF8&qid=1544909911&sr=8-5&keywords=magnifying+headset+with+led+light&th=1
That's it for today.