It is an often discussed topic, using nitrogen instead of pressured air for the atomization of paintings.
AOM-Systems and Axalta performed a study on the effectiveness of the atomization process using nitrogen. The results are published in the “besserlackieren” magazine volume 13/2018. Unfortunately this magazine comes in German language only. However, if you are interested in the results please give as a call or send us a note. We are happy to get in touch with you and discuss the topic.