I wanted to know as well! The resources I found, though, don't mention anything about what is the safety precautions one should take about the dust generated in the process. What masks to use and such. I understand everything should be done wet, but I wanted to know, for example, if one should wear a mask when polishing with cerium oxide even when wet. Maybe I'm being too cautions of this? I do fear what I don't understand! It's hard to make decisions without numbers. If anyone has any info on this please let me know! :)