No one told about when Pakistani bowlers used their nails so that they get better out of the ball but it eventually came out, is it not?
Gilchrist clearly mentioned that he did use it for enhancing his grip. Mind you, he had failed in previous outings and opted to use it only during the finals!
He clearly knew taken this to his advantage. Even Hydan, Ponting etc...struggling in the middle during the finals. Let us not forget that.
