Again - not an expert.

I have seen tumbling in Cambay, Firozabad, Benares and Purdalpur, but that is not what you are after!

Putting color-colornats on a bead, then fire the beads in hope to achieve an effect?

Use a helmet, is what comes to mind first! The moment you "fire" your bead with a torch - mini or maxi - the bead will crack and fly in your face. A potentially dangerous task. The only way to avoid it would be to heat the bead up gradually (in a kiln), close to the point before it begins to lose it's shape - than the popping of the beads could be prevented.

None of this is really worth the effort, especially since you won't reach the desired aging effect anyway.

https://www.youtube.com/watch?v=DlXePYM11ew

Seriously, Jamey, first of all, thank you for this sharing this observation.
And I'm guessing if I....er....do the experiment, I don't think it's something I'll share with my customers! :^D

Years ago, I was doing a major fine craft wholesale show, and met many metal workers who were doing wonderful stuff with patina. (This was before the market explosion of do-it-yourself patina gels & such.)

One person said that not only did they get great results by putting the finished metal items in their cats' litter boxes, they discovered that EACH INDIVIDUAL CAT's urine produced a different effect!

Haven't had the urge to test THAT one, either. But maybe I'll try the glass beads in their boxes. :^)

When hot - baking soda will give the glass a pitted boiled look as will salt. Research the term "scavo". This is a powder mixture that glass blowers use to make glass look like it is old and has been excavated. Hydrofluoric acid will dissolve glass.