Here's some toning examples I just did on the Fomatone MG Classic Warm-tone Cream-base Natural 532 surface.
All the prints were split-filter printed at the same settings and developed in Silvergrain Tektol Standard developer (diluted 1+ 14) for 150 seconds.
The toners were:
Kodak Rapid Selenium Toner (KRST) diluted 1+6
Thiourea-Sepia toner (Sepia Y) @ 50 thiourea:10 NaOH:440 water for a yellow toner; ferricyanide bleach was 30 seconds
Thiourea-Sepia toner (Sepia P) @ 10 thiourea:50 NaOH: 440 water for a more purple tone; ferricyanide bleach was either 30 seconds or 300 seconds
Clerc's Thiourea-Gold Toner (Au)
1st row: no toner; KRST 30 sec; KRST 120 sec
2nd row: Sepia Y w/30 sec bleach; Sepia P w/30 sec bleach; Sepia P w/300 sec bleach
3rd row: Au 300 sec; Sepia P w/30 sec bleach then Au 300 sec; KRST 120 sec then Au 600 sec [my favorite]
4th row: Au 120 sec then KRST 120 sec; Au 300 sec then KRST 120 sec
I like the purple shadows/blue highlight split I got using selenium toner for 2 minutes followed by the gold toner for 10 minutes.