as promissed here is my LED glass polishing process in detail.
the flat felt disc enables water to stay put. my drill has speed control which I adjust according to the glass type (thick, thin, mineral, etc.)
I apply just a bit of the cerium dioxide paste and turn the engine on to remove the excess of water (to decrease the level of chaos/mess during work).
a cardboard wall is useful to keep the surroundings clean, an apron for yourself and glasses/goggles might be handy.
During polishing I spray water approx. every 2-3 minutes and check the effect at that every step - it's better to check more often than to remove to much of the glass.
A lot of the cerium particles remain on the disc so I just add water but also add a teaspoon of the paste once in while when the cerium color gets weaker.
The best effect is achieved with higher temperatures therefor I don't use gloves so that I can feel the heat increase on the glass.
Once it's starts to feel uncomfortable I make a short break to cool down the glass and add water.
This process requires some experience. Most crystals with deep scratches need to be treated with abrasive paper first.
Otherwise it will take a lifetime to achieve an even shining surface.
Signed crystals need special attention by polishing them at the edge of the disc and covering the logo with you fingernail.
I suggest to have medium length fingernails (at the day of the nailcut?) during this process as that will also help to keep control of the crystal on the flat rotating disc.
A good idea is to keep the crystal in the case which will make it easier to get a better grip and control the process.
I also fill in the case with water and sometimes also close it with the caseback when I have to check the outcome very often.
The water will cool down the glass from the inside and prevent damage.
The last picture shows you a Pulsar P3 crystal after 20 minutes of work.
I didn't take a picture before the polish but imagine an entirely scratched surface just like the surroundings of the Pulsar logo, which could not be removed due to the small distance to the logo.