I've used a Diamond cut stone, they work well for hard steel and rough cut broadheads. The final touch I use white crock sticks. They are the ticket in my opinion. My heads from just the weight of them will cut my skin when sliding them on my hand. Then you know you did a good job!

70% of the people I believe do not have a clue on how to sharpen broadheads. Its good that you ask Dan. Hopefully people will check this thread out.