I had purchased some arrows last night.... Carbon Fury Blazers. After getting them home there were two arrows that had one vain that was bent over, like the top fin of shamu. Some may know this but incase someone else doesn't, I used my wife's straightening iron to fix them. I just turned it down to the lowest setting, let it heat up, and placed the vain between the jaws of the straightening iron and clamped down on them for about 5 seconds. This worked perfect on both arrows.
cigarette lighters and butane lighters work well too, just have to move the flame quickly so you don't burn the vanes