[mikewarot]

I think electrochemical polishing[1] of the discs on both faces could be done without killing anyone. Since everything happens in a liquid, no vapors should evolve.

A VERY flat surface might greatly increase the bounce.

A surface coating of BAM[2] might also help, by increasing the hardness, and lubricity.

I think there's a lot of room to go in increasing the hang time of the bouncing bearing.

[1] https://en.wikipedia.org/wiki/Electrochemical_grinding

[2] https://en.wikipedia.org/wiki/Aluminium_magnesium_boride

[Justin_K]

I was wondering if you go this route, how do you dispose of the liquid after? Once the liquid evaporates, dust is left behind.