The hockey equipment staff actually applies the wings with maize tape, as painting the wings would create some kind of hazard for the players. According to a guy in the hockey office who gave me a tour of the Yost locker room a few years back, the paint chips really easily and if inhaled is pretty nasty. Another commonly cited reason is that painting on a logo would void the warranty on the helmet and/or make it unsafe.
Thus, tape. So, get yourself a big roll of maize-colored tape, and go to town! May take a couple hours, but it's authentic.