The chemicals will slowly kill you. The over spray can kill you the first time you use it.
Cover your eyes and skin!
Your eyes absorb the chemicals.
The clear over spray isn't something to mess around with. It enters your lungs as a liquid and dries deep inside your lungs. You will not feel it coming! You will feel short of breath and can pass out before you have time to do anything about it.
I've talked to several builders and they didn't know the charcoal filter has a 48 hour shelf life only if they are stored in an air tight container. The nice air tight bag they come in is for storing them between uses.
It's expensive to replace the respirator after every cue so in the long run full face fresh air masks are a money saver.
Nothing fancy just a pump placed where the air is clean with a tube and full face mask. I use a pump for blowing up air mattresses/beds that I found at the second hand store for $5. It's set up so I plug in when I enter the booth and easily unplug when I walk out.
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Here is a link if you don't believe me.
http://www4.uwm.edu/pps/Usaa/RESPIRATOR/PPS_faq.html
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This is the important thing about this link.
What's the shelf life for black/charcoal filters?
Left with their original packaging intact, the charcoal filters can be stored indefinitely. Once opened, the cartridges should not be used if stored more than a few days, and then only if they were stored in an airtight container.