I have been using a lighter for a couple of months and it works great on Duras. Don't over-do it though.Sometimes it takes15 seconds for them to un-wrinkle after you put the heat to them.

I used a hair dryer and turned the heat up and let the intake suck my t-shirt around it to get max temperature rise. I did each vane for approx 15 seconds and it did not work at all. I walked back downstairs muttering "what a load of Crap" and when I went to put the arrow in the case noticed the vanes were like new again. It definately works. The temp needs to be pretty high though.

Heat em' up real hot until they melt and fall off....then put some feathers on