Viradon 1+24 for 4 min (i thin the picture was revealed using PQ universal before..) without prior bleeching gave me a slight purple cast in the shadow and some yellow in the light. I am not sure it is reproducible though...
I talked to W. Moersch about that and he said his "siena Toner" could do that with that paper (split-toning with just one toner) with just a very short bath and then a water bath and then rinse.
He told me also that deep selenium + blue toner (direct) would work.
On flickr I found a pic with a selenium/ viradon toning example on that paper (or the plain Fineprint VC version of it).
That´s all I know but I´ll continue trying myself!
JJ