I have used the spray cans from NY Marine with good results. I painted two 1957 Evinrudes with their paint and am pleased with the results. Gas getting on the paint has not affected the paint. However, I do believe you can get better results using a spray gun if you know what you are doing.
1958 Vagabond II & 35 HP Evinrude
1955 PlastiCraft 12 Ft. Delux Runabout
1957 Clipper & twin 35 HP Evinrudes
1957 AlumaCraft 14 Ft. FD