Cello does squat to stop beetles - they eat cello. However, they don't eat plastic, so you can isolate cigars/groups of cigars with ziplocks while you process them. Divide and conquer.

Spanish cedar is not beetle friendly. They shouldn't be able to eat the stuff, lay eggs there, or pupate or whatever. A good vacuuming with the crevice tool is all that is needed (unlike mould).

Good luck!