Bush-I think most of what needs to be said has been on this subject. I would just like to add that if airoplanes where meant to have any crinkly rough surfaces then someone would have built them that way-no good eng would offer a kite for service with any contamination and no good pilot would take it-its also interesting to note that some 80 percent of quality reports I saw from this period last year with an airline I know refered to deicing being carried out incorrectly - know your subject -Kilfrost do some good training vidoes etc.