I have the one on top in the photo's above.
If you have the patience to allow everything to settle prior to opening the grinder you can probably get by without using anything. Sadly I don't and as soon as the blade stops I tap the grinder down a couple of times and open it up. Tapping doesn't do much. I have a modern military gas mask I just can't find the damn thing. I do have an entire MOPP suit, Mission Oriented Protective Posture, that is used to protect your entire body during an NBC attack. I don't use it so if anyone wants it let me know.
If you have the patience to allow everything to settle prior to opening the grinder you can probably get by without using anything. Sadly I don't and as soon as the blade stops I tap the grinder down a couple of times and open it up. Tapping doesn't do much. I have a modern military gas mask I just can't find the damn thing. I do have an entire MOPP suit, Mission Oriented Protective Posture, that is used to protect your entire body during an NBC attack. I don't use it so if anyone wants it let me know.