European wind-power executives are a sober bunch - at least during the day. So delegates at the European Wind Energy Associationconference in Brussels were surprised to be accosted by a showman in a white silk suit and pink shirt - with ruffles - noisily pushing "wind turbine wonder polish".. Passers-by were invited to try the wet wind wipes on a sample blade, the pristine surface of which had been defaced by bird droppings, causing hilarity and bemusement in equal measure.