A guy that was sitting where Kenny (ISF) and I were said one of the track people told him it was lime they were spreading. Per wiki:

"The broadly used term lime connotes calcium-containing inorganic materials, in which carbonates, oxides and hydroxides of calcium, silicon, magnesium, aluminium, and iron predominate."

Whether that's what it actually was or whether it had any effect, either positive or negative on the great racing we saw on this night, I haven't a clue.

Jerry