I wonder if many people Selenium tone, then Sepia. I use the smelly kodak sepia. I put in Selenium (1:7 dilution, I think), wash, then bleach back the highlights and some midtones in the Sepia Bleach, wash, then "develop" in the sepia toner.
The Selenium appears to "protect" the dark tones, so that, when you put in the Sepia bleach, they don't vanish, as they normally would. Then, when you tone in the Sepia toning solution, only the mid to highlights get the slightly brownish Sepia.
My challenge has been figuring out just how long to leave in the Selenium, so as not to mask the later Sepia toning to much in the midtones and highlights. I've been using Oriental Seagul FB MC paper- I don't know if this is considered a relatively easy toning paper or not, but so far I have gotten some pleasing results.
I'd like to hear any other comments related to Selenium/Sepia workflows and materials...