It may seem common sense, but do not allow your operators to share respirators.
With the shortage of half-masks, many are looking for other solutions for their painters. Supplied-Air Respirators (SARs) are a great substitution for negative pressure respirators (standard half-mask).
Clemco has provided excellent information on cleanliness procedures for blast equipment and blast respirators. You can view it here.
The respirators below are our most commonly purchased to replace negative pressure masks: