To investigate potential impacts on automobile finishes, droplets of 4 naled formulations were applied to 3 contemporary automotive paints and assessed by means of microscopic and unaided visual inspections. Three droplet size ranges simulated ground- and aerial-based ultra-low volume applications and were each generated for Dibrom Concentrate, a new formulation of Dibrom Concentrate (VC-1088), and two other new naled formulations (Trumpet VC-1083 and Trumpet VC-1084). Du Pont automotive paint finishes tested were RK7072, RK8010, and RK7120 used on Ford trucks, General Motors cars, and Cadillacs, respectively. Visible spotting was never produced by small droplets averaging (SE) a volume median diameter of 13.12 microns (0.44), and quantifiable microscopic spots were detected only on the RK8010 paint finish. The latter paint finish was the most susceptible to spotting, whereas RK7072 was not affected by any formulation at each droplet size.
