My idea is to put the individually screened chems (German dark plus aluminum atomized) directly inside one of the two half shells.
For that purpose I will use a 2" paper shell.
When I have putted the two not-mixed chems until it is completely filled (or just a little bit to avoid dangerous leak), I will close the shell with the other half and wrap around the equator the usual wetted gummed tape.
Now I will start to paste the small shell as usually, but since the shell is half filled, the continuous rolling act like a washing machine, mixing perfectly the chems inside.
In that way I will avoid one of the most scary passage: the diapering.
Besides this, I will work with wetted tape, so the risk of sparks is reduced to almost zero.
This method can work fine and can effectiverly reduce the risks?
When I work with BP, KP or flash I wear only cotton and I work directly on the floor with naked feet, in an humid environment (>50%) and usually with wetted hands.