Although not strictly the subject of this thread, the worst coal dust/slime I ever encountered was around 1965 in a 505 at Pennington Flash which I think was known in those days as Lowton S.C. Worse than that, we arrived from Scotland, bright-eyed and bushy-tailed, only to be met with a carpet of white stuff in the dinghy park. On closer inspection and checking with the club members, we discovered that the club had just been visited by vandals who had burned about four or five 505s, the polyester resin going up in flames leaving the fibreglass cloth behind. This was a very sad start to our visit and after a capsize and putting our mast in the bottom, we went home with the top of the mainsail looking the worse for wear and virtually impossible to clean when we got home. I have read much happier reports from Pennington Flash recently and I am sure it is a very nice club! N3535 (ex-505).