I would use the crystal that came with the case, but I'm pretty sure you can't remove the magnifier without damaging the surface. Right?
I tried the tea + sun method today. (thanks @TheLost ) It actually works quite well. I might paint over the lume a little. My attempts with heat haven't been very successful lately.

I tried the tea + sun method today. (thanks @TheLost ) It actually works quite well. I might paint over the lume a little. My attempts with heat haven't been very successful lately.

