The halberds came in "kit" form - a blackened (or painted, I'm not sure) steel head and a plain shaft, with an instruction sheet that said to "hammer the head onto the shaft and attach with the included Phillips head screws".
The head looked like this:
Over the course of the past few years, every time I remembered, I'd hit the head with a nylock brush mounted in my drill press, and after many sessions the black gunk was completely stripped.
Yesterday I finally dragged out the shaft and a belt sander and vowed to finish the halberd. Fitting the shaft perfectly into the halberd's socket took most of yesterday afternoon: sand down shaft, spray some oil into the socket, insert and withdraw shaft, sand down the parts where the oil touched; repeat repeat repeat repeat repeat repeat, etc.
(If someone has a better suggestion for sanding down shafts to fit perfectly into tapered sockets I'll be happy to hear it!)
Late yesterday I stained the shaft and let it dry overnight, today I finished the stain and added a bit of wax as a protectant. I heated the socket with a propane torch to get the metal to expand, then pounded it onto the shaft. After cooling, I drilled through the CS-supplied one-side-only screw holes, pinned the head in place with knife-making rivets, then added a jaunty fringe.
Here's the final project:
The halberd is almost ridiculously sturdy and weighs nearly double to what I've seen with historical pieces, but the next time I'm attacked by French heavy cavalry I'm going be able to split armored knights from helmet to saddle with this beast.
