So Neil, were you working with high contrast digital paper negatives, or what? Wonder if you can make salt prints with a digital projector, would only take few days to get the exposure!
Selenium, huh? It was obligatoire for any young man seriously making prints in the manner of the Masters. Lots of chemical bullets were flying in those old darkrooms, I never even thought about it at the time.
EDIT...just noticed your related thread in the Wet Darkroom forum...