Hi Photoe,
I just tried these papers for the first time as well, so I'm not experienced with toning them beyond the one batch I toned, but what I found was that the neutral looks really nice in sepia, but I didn't notice a huge shift in color in selenium toner. However, the image that I toned sepia and then toned selenium shows a little purpley tinge. I like it. I used KRST 1:20 because that's what they had mixed up in the public lab that I print in, but I suspect that you could get more color shift using a different dilution. But the sepia looks really nice, warms is up without looking totally fakey. Really nice, I thought. The warm tone takes selenium really nicely, again I used the KSRT 1:20, and probably only left it for about 5 minutes or so. Also, not a super in-your-face color shift, but nice, added some contrast. The warm tone got really orangey-red in sepia, and I didn't care for it as much. But again, pretty unscientific, only tried it once results.
The one problem I did note with the warm tone is that I got yellowish staining on the edges of the paper that seemed to go away after toning. It's actually not quite as noticeable as I first thought, but still kind of annoying. I am going to try another batch of the paper to see if the yellowing was a once off thing or not; I just ordered a bunch of both Oriental neutral and WT, which I was hoping was going to be delivered today so that I can print tomorrow (my only day that I can get to the lab) but apparently The Day After Thanksgiving is a UPS holiday, soooo, no paper. Oh well, hope the UPS workers are having a great day.
Anyway, have fun with the toning!
Julie