What I did on this one was tape it into position and shoot studs from the back. This one was really easy so i didn’t cut out a stencil to line it up. when i say stencil i mean outside layer to match up with backer if that makes sense. If you have any questions just ask
What gauge do you typically use for layered signs? Also, do you use the threaded stud with or without tapered heads? The way you describe shooting them through makes me think you opt for the more expensive studs without a tapered head.
I use 16ga steel for most of my layered signs. I watch for good deals on good studs like i found few months ago and purchase 600 for $75. The 1" studs are normally too long for anything so I thread a nut on it and cut the excess off. When you unscrew the nut it will fix the threads so you can easily reassemble after painting each layer. I mainly use 1/4"x20 size studs because there strong. I originally started marking my spots and taking off layers to shoot my studs and figured out the exact size circle I need to shoot through layers. When you do this the weld stud stays and you can added nuts as spacers or just add nuts in the back to hold together.
Thanks for the additional info, much appreciated. Looks like you are using the flanged studs. You can get ones without the flange, but I am not sure they are worth it (see picture). Especially since you already have the hole size figured out and a little fudge room is always nice to have in case the outer layer needs adjusting. I am also buying the 1" version and cutting them down if needed, using the same method you describe. The signs I have to do are outside so I have opted for the stainless steel versions. Your posts have been quite helpful.
I want to mention JB weld works well when you have painted your elements separately. It’s like a 2 part epoxy. I use it when I don’t want a fastener showing. https://www.jbweld.com/product/j-b-weld-twin-tube
Slightly off topic but I’ve been asked to make an access door/vent for an older homes foundation. Do you think using the really strong magnets to secure the screen and the solid door would work if I powder coated over the magnets to keep them in place? I’m thinking the frame mounted then screen then door stuck on top of each other with the magnets.