You can tone pt/pd prints. If you are aiming for that "warm" look, print on a warm base paper, like the Arches Platine. Print in Palladium, to enhance the warm look. You can gold tone or selenium tone. I have tried selenium, and it works well to give you the deep black dmax. However, it seems that Pt/Pd prints exhaust the selenium rather quickly. You tone the print like you would tone a regular silver print, after final wash.