If the authorities find out you post here, they’ll crucify you. However, if I was going to engage in this risky activity, I would use an airless sprayer, something like the Krause & Becker unit from Harbor Freight ($219.99), and a small generator, around 1000 watts, and a 5 gallon bucket of paint.
It would be applied by someone laying in the bed of a pickup hanging over the tailgate and spraying straight down as the driver motored on.
But, I’d never do anything like that myself. :-)
And, I would, of course, use cash for everything I bought while being very, very, safe and wearing my full face mask. Afterward,....long afterward,....after a year or so in storage, the tools would go on craigslist.