In my experience with selenuim toning I have found the following

1. Ilford MG RC seems to change color very little.

2. Ilford MG FB Warm Tone and Bergger FB Warm Tone the color change is dramatic and in my opinion very pleasing. I tone at 1:9 for up to 5 minutes. The toner is reusable for many sessions, so the time tends to change as it loses it potency.

3. Ilford MG FB does not have as dramatic a color change as Warm Tone

I cover my trays with plexiglas so my exposure to the fumes is short. I wear gloves.

Even though RC doesn't have a color change it is still getting the archival effects.

Make sure you wash the print thoroughly before toning and again after toning.

Hope this helps.

Michael McBlane