mmh... tasty fiberglass...

*me remembering what happened to a certain raccoon the last time he had cotton candy* WAIT NO, NONONONONONONO!

wouldn't water proof cotton candy pretty much just be regular cotton? whatever it is I can't imagine it'd be very fun to eat; cotton candy's main deal is that it dissolves so quickly, if it didn't it'd just be like chewing on a tough fibrous mass.