Electrostatic painting has existed for well over 50 years, I doubt there's much difference in efficiency with this system: the parts and paint are at tens of kV

Electrostatic painting has existed for well over 50 years, I doubt there's much difference in efficiency with this system: the parts and paint are at tens of kV of potential differential, the paint has pretty much nowhere else to go. The main issue with such painting technology is the homogeneity and size of the droplets or powder clusters.