I've recently acquired a front magtek for my NSR. The previous owner of the wheel has sprayed SEVERAL coats of spray epoxy on them. What would be the best way to remove all this ? I'd love to sand them down by hand but there is no way to get into all the spokes. I've heard that using chemicals is a no no on magnesium. Blasting the only way to go? What media would be best?

Is there a special primer to use on the magnesium?