Some homebrewers reportedly use the drill with a paint stirrer attachment to agitate the oil while mixing the combined methanol and lye in the processor. It’s like dynamite with the fuse already lit.
Both methanol and methodide are extremely explosive. Any electrical sparks - even from switches or blown lights ought be avoided. I use all coiled flourescents in my open processor shelter and I mounted all my switches or switching devices at eye level since the fumes travel close to the ground.
A small capacitor across the switch terminals will “snub” any sparks from the switching process..........0.1uF 1000V would work..........