I also avoided it for a long time because, like you, I was worried about the process. Especially as I had had little success with my attempts in the 90s.
But now it turned out to be much less complicated than I had thought.
I am currently preparing a short experience report for a neighbouring forum.
Friedemann Wachsmuth has described a good and inexpensive process
here in German. I have now developed a good 50 films with it, and only two of them are really spoilt. The bleach bath was used up on one of them - that wouldn't happen to me today.
As the
Dokumol developer used by Friedemann is hard to find, you can also use another paper developer, you just have to find out the first development time. Someone has described it
here with
Ilford PQ Universal.
Second exposure is unproblematic. I place the film spiral in the open developing can filled with water and illuminate it from a distance of approx. 25 cm for two minutes with a lamp (equivalent to a 100 W incandescent lamp: a 23 W energy-saving lamp).
I then turn the spiral 180° and illuminate it for another two minutes.
You only have to be really careful with two baths:
- You have to keep to the time and temperature for the initial development. This is basically the same as with negative film.
- With the bleach bath (potassium permanganate) I always check the result before the next soaking: if the film still shows dark brown spots, I bleach again for a few minutes. If this still doesn't help, I prepare a new bleach bath (or lazily pour a shot of sulphuric acid into the old bleach bath) and bleach again for three minutes.