Dust Extraction
Many amateur fossil preparators don't use dust extraction when they are only using air scribes or air pens in their home workshop for maybe a few hours a week, but dust control becomes essential if you are using air abrasives or working long hours in your workshop on a frequent basis. To a reasonable extent, if your face mask is well fitting with suitable filtration, you'll find that you can control the air that you are directly breathing quite well to make sure that it is free of the fine dusts that are so dangerous.