Let me say to be complete on the information that I initally got the idea to try the approach from a somewhat oblique statement in Dick Sullivan's pt/pd book about bleach and HCl. He mentions lightening prints that have been overexposed.
I called B+S and asked if anyone had really tried this approach, and they told me that it hadn't really been done to their knowledge, so I worked up a basic procedure for it using two bottles of solutions.
So I can't claim credit for the origin of the idea, but I did put a few things together to come up with a good technique to eliminate the pesky pt/pd spots that sometimes occur.
As for APIS, I also recommend that anyone interested try to go. Where else can you meet some of the best alternative printers in the world? There's so much to learn from a group like that, regardless of your skill level. It is an inspiring collection of people and prints, to be sure.
Alternative Photography International Symposium
It will be held July 7-9 in Santa Fe, NM. Bostick and Sullivan is the contact point for information, but they currently dont have information on their website.
It has recently been held in England and the US every other year. This year, it's the US's turn.
It is also at the same time as the Photo Arts Santa Fe, so there are all kinds of gallery shows, and other events going on, including a trade show, and many special happenings.
I'm going to try to be there this year if I can swing the schedule.