Flies - yes I powder coat the bodies, they are lead bodies poured from a Do-It mold that I got in a trade. The wires that they're molded on I cut the ring and the bottom off and bend the wire in an L shape so it fits either in the jar or in the fluid bed.

These are my curing racks, cheap and easy to make. Just aluminum bread pans and I lift all the edges straight up and use a hole punch around the edges to hang jigs from.
If you look at the top left pan you can see that I just stick the wires down through one of the holes and ususally out the side of the pan for stability. Any drips go inside the pans

Heat the bodies just like a jig and dip in the powder in a quick side to side
movement just deep enough to cover it. If you find any spots take a paint brush heat the spot lightly and tap a bit of powder on it and set with your heat source. Cure just like your jigs.

The fun comes when taking the wires out!! any powder that gets on the wire just take needle nose plies put them around the wire and do a circular motion to clear it and then wiggle the bodies off. I keep the wires as one batch the wires got pulled and I just stick the wire in and reuse it.