Gordondet
Member
Upon their request for a self-luminescent front sight, my solution was to visit a friend of my parents who was a watchmaker. He furnished a small can of wax that contained a white substance that is used on watch dials to cause them to glow in the dark for several hours. He recommend white rather than green because it retained luminescence longer.
I placed the open can of wax on my electric stove's burner. The wax flamed and burned away, leaving a white powder. From that point our procedures are similar. I used clear epoxy as the binder. I experimented to identify the ratio of powder to binder and have a durable insert. I also used a tiny drill to use as a combination anchor plus receptacle for yet more powder-binder.
Great Idea. I decided to see if I could find something similar. I did.

It's from this site.
Luminous Watch Hand Paint - Dial Luminescent Powder | Esslinger Watchmakers Tools
Kind of pricey per gram but may be worth a shot. One thing to look out for, especially way back when you did it, is these powders may be somewhat radioactive.
And I'm not sure how well they would work with colored pigments, and type of pigment (powdered vs liquid) may make a difference as well.