I use a 600 grit paper and then I'll go to a 1200 grit on a very flat surface it only take's a few minutes per head and they're deadly sharp. But also Montec put's out a stone that I'm going to buy and give it a try as well .I think I'll try the stone and then again I'll go to the 1200 grit paper to finish it off ,I'm not sure that I'll need to go to the paper after the stone but I'll try it anyway's . The Montec stone isn't cheap I seen it at Bass Pro for $30.00 but it's biult for the perfect angle on the head.

nubo