Thanks to everyone who helped me with re-hardening of the frizzen. I have to say that it works great after treatment with Kasenit, and I included some pics for reference. It's amazing how many sparks one actually gets, and that it only takes one of these sparks to flash the pan. I used my Olympus SP-350 in "available light mode" in the pitch black.
The lock is resting in my bench vise, and I am triggering it by pulling up on the tumbler.
The lock is resting in my bench vise, and I am triggering it by pulling up on the tumbler.