if your using conventional aircraft than dye staining the crowed would be the last thing you would have to deal with.
the underbelly of your plane would would be what ever color the dye being used was.
color dyes are not recommended unless you use sanders smoke systems that are mounted on the wing tips.
jet engine planes would not have that problem as the smoke would not be brushing the underbelly.
we make two types of color concentrate for aviation use.
one is the same stuff used in the jets you see performing making color smoke at airshows.
that concentrate is dye and solvent that would be mixed into diesel fuel.
the other is a concentrate that we developed for mid-town petroleum for for use in mineral oil or better know as super dry white smoke oil.
this concentrate contained 4.5 pounds of color dye per,gallon solvent.
the customer would treat 5 gallons mineral oil making a total of 6 gallons.
now for fogging the crowed and all the cars in the parking lot i would not try that with white smoke oil let along with color.
what ever is pumped threw the exhaust will no bought fall from the sky eventually.
white smoke oil is mineral oil so even tho the stuff still comes down in very small droplets is often goes on un noticed.
dye don't burn it vaporized into smaller particles so yes it would be like spreading pesticide.
you would have a problem with color smog selling on what ever was under the past.
