Ive seen a couple of threads on powder coating jigheads and thought I would share my way of doing it. What I do is lay out some masking tape sticky side up and lay my jigs on top of the tape with the lead head sticking out past the tape. I layout about 40 or so. When I get 'em all laid out I put a second piece of masking tape on top of the jigs, just the hook. I primer or use pearl color then spray paint 'em any color I want. If I want 5 one color or 100 I can just tear off what I need. Granted, powder is tougher so if your bouncing them off the wall below the bridge you might lose some paint but for vertical fishing no problem.
Anyway, just a quicker method I have found to get the heads painted. I use about 6 basic colors for the heads and then concentrate more colors on the body and tail. I also clearcoat the heads. I'll attach a pic. Hope this helps.