Why not just use 2 color plastic sheets from Rowmark and laser them. The letters are bright white and very precise, and you can shine any color LED through them for backlighting. I thought I had shared this with you previously but I guess I didn’t. Oops…
You do need to spray it with a clear protectant acrylic to prevent scratching after you’re done lasering them. I use photo protectant spray paint from Michaels.
I mount the sheet to the CNC bed. Then laser with the laser head. Then swap out for the CNC head and cut it out without removing it from the CNC bed. Once I figured out the process, I began using it for all my faceplates and button tops. If you use illuminated tactile switches, they will shine through the button tops.
Here’s a pic of my button box. All the buttons are 3D printed and capped with lasered inserts.
https://forums.flightsimulator.com/uploads/default/original/3X/7/4/749c8ce62a493caab0895f23d3381320dc8e6bd4.jpeg
