Turbine,
The overspray that you see is not paint, it is the clippings from the white turf from the numbers after they put them down. Nothing on the field will be painted. Everything on the field is turf that has been colored by the turf manufacture. If you look at the picture of the installation you can see that the they shave the turf where the numbers go then glue down the colored turf in that spot. The same thing will be done in the endzone and middle of the field with the Logos In reference to the I Love Bri. This had to be done at night when the workers were present so I assume that it is probally one of the workers that laid down scrap pieces of turf as a message to his girlfriend. I seriously doubt that someone got down on the field and painted this while the workers were present. And since they work from 7pm to 7am im sure they were there.