I've done the inner bezel ring on Opalec NewBeam modded MiniMags with great results. Starting with a base coat of white nail polish followed by several coats of home-made glow paint (using the recipe of clear nail polish mixed with glow powder posted at flashlightreviews.com). Using the flashlight charges the glow material and it stays surprisingly bright for a long time (all night). To satisfy the department of redundancy department, I also wrap a stripe of glow tape around the body of the light.
These lights (with Kroll clicky's) are my go-to light for 90% of my needs and thusly modded, are fantastically useful and enjoyable flashlights.
Cheers,
Dave