Aviation Dictionary
وجود حباب های ریزهوا زیرسطح رنگ ، گیرافتادگی هوا زیر سطح رنگ
a fault resembling haze in an enamel or lacquer finish of an aircraft. air impingement is caused by microscopic-sized bubbles in the finish that form when the finishing material is applied using too high an atomizing air pressure.