"How To" wrap a rotor magnet...

[Tempted]

I would use a balloon. You can melt it off with a lighter without hurting the epoxy. Just pull as much off first, then burn the remaining a little at a time. Keep the rotor dunked in water as soon as you burn the balloon and it should be just fine.

Edit- I was just thinking, exactly how important is the exterior wrap? Just let the epoxy dry and sand it smooth.