Thanks for the suggestion Thomas. I've had very limited success with bleach/thiourea. It seems to never come completely back. I'm using the bleach and tone mix Daniel uses on his beautiful prints. Maybe my bleach mix is off.Even if I resolve that issue wouldn't the thiourea replace this color with it's own? I know they are similar. I believe that would give "top" /down protection first, then the selenium would start from the bottom and can't go into the highlights?
It doesn't come completely back. So when you make your prints, you give them slightly more exposure than you think you need. They never do come completely back, and you need to learn how to work around that.
If you bleach with the bleach at such a high dilution, it will have very minimal effect. But the re-development in thiourea or sepia means the selenium reacts differently than to pure lith. The highlights get really warm in the combination, which makes a beautiful print. With the bleach you have to be precise.