I recommend the “rub it on a wook test”.
Anything new proposed to be taken into the booth needs to be rubbed vigorously on a dry, ungrounded Wook for at least sixty seconds.
Both the Wook and the object are then grounded, any static discharge from either the Wook or object means it’s a no go.
Try that with a 5gal plastic bucket…
Edit: here in OR, actually finding a DRY Wook is problematic at some times of year, using a Wook at ambient humidity will at least give some reassurance. See: Static electricity ⚡️