DuCo lacquer was a nitrocellulose lacquer. Quick drying, high build, and polished out to high gloss. Perfect for mass produced automobiles.
Instrument people still use nitrocellulose lacquers.
Behlen's is popular. Available at Woodcraft stores.
As Steve Schoene, Master finisher says, "Test your finish on scrap or you might have to scrap your finish"
Here's a finish schedule from an instrument site
http://www.stewmac.com/How-To/Online_Resources/Finishing/Nitrocellulose_Finishing_Schedule.htmlI water pop, sand lightly at 320, dye, then scuff with 400 just to be sure it's as even as I want. Test samples can really help you understand the transparency of base dyes. I typically use them to highlight figure, or establish a base color I want a hint of in the final look.
I'm doing a door today that I can post pictures of tonight.
But it will be in misfires.
Addendum: For purposes of clarity, look at the piece for what it is. Economy shotguns only had a certain amount of time put into finish. You can sand to 220, water pop, and de-fuzz at 320, and be putting finish on a surface that is smoother than original. And it will show. Over finishing makes for a very "plasticized" look.
That is not how these guns were delivered.
They were smooth, but not polished.
Compulsive pore filling was not part of the program on hdwe store guns. Even color, a certain thickness of finish, and that's about it.
So, you can take a chunk of American walnut from Menard's, and fiddle with it to create a finish schedule that near exactly matches the original pretty easily.
Wood finishes are a journey that is a great deal of fun. Practicing on scrap is part of that.