Not ours I hasten to add, we certainly brushed more off then we applied. Problem is, although the problem gets wet readily its well sheltered from the wind and the rain, and its dead popular. We were there on a monday, so it'd had the full weekends attention n'all.
A couple of weeks ago I met some guys trying to dry it out on a damp day, it was covered in chalk obviously. If they'd read FOR they'd know the only thing this creates is a paste useful for curing stomach upsets.
Here's some more pics to cheer you up:
He didn't do either I hasten to add, mainly due to fact that his skin finally went through about a second after the first pic.