What promotes atomization of paint during application?

The correct choice emphasizes the role of center orifices in promoting atomization of paint during application. Center orifices facilitate a focused stream of paint as it exits the spray gun. This design creates a high-velocity jet of paint, enhancing the breakdown of paint particles into fine droplets. Consequently, this results in better atomization, which is crucial for achieving a smooth and even surface when painting.

In terms of other options, while wide spray nozzles may cover a larger area, they do not necessarily contribute to the fine atomization required for high-quality finishes. Low-pressure settings can result in less effective atomization, as the paint may not be propelled with sufficient force to break adequately into small droplets. High-speed rotors can enhance mixing and may create some atomization, but they are not as directly associated with the atomization process as center orifices in the context of spray systems used in paint application.