In a fit of procrastination, I decided do conduct an experiment.
I had an 8x10 vandyke print from an extremely dense negative, and because of the long exposure time the thing was grossly solarized. There was some detail, but the surface of the print was basically shimmering silver. It sat around for a month without a purpose.
Today I decided to see if I could bleach it to something more useful. So I dunked it in some potassium ferricyanide. Sure enough, within 10 seconds the solarization was gone, the detail was restored, the contrast range was better. But that wasn't enough for me, so after washing it I gave it a brief treatment in fotospeed gold toner, which bleached it further, made the highlights warmer and more reddish and made the shadows cooler.
It's drying off now, but maybe I'll scan it later.
But it got me to thinking how flexible this vandyke process might be. I was half temped to take an overexposed one, bleach it, then put it in lith developer to see what happens.
Any other similar experiments?