Bear-- That brings back a lot of old memories on how it was done, especially the wedge formations and the use of "red" dye for identification of the agitators in the crowd. They could never get the red dye off their clothes and skin.
I wonder if that was rhodamine dye? We used it for stream pollution diffusion studies back in the '60s. Once you got it on you it was over.
Bob
"It is said, 'Go not to the elves for counsel for they will say both no and yes.' "
Frodo Baggins to Gildor Inglorion, The Fellowship of the Ring