[Al Skierkiewicz]

Jeff,
A few caveats, the heat generated inside the motors won't be cooled very well by spraying the outside. Particularly the outside of the Chalupas. Also be careful as the refrigerant can wash lubricant out of the bearings, especially bronze sleeves. A towel or paper towel, dipped in cool water and wrung out will conduct a significant amount of heat from the motor case, just be sure to keep drips away from the electronics. You also might want to try backing down the motor drive in software, even a few percent could make a difference.