POP should work well on your UV source for palladium. It will probably
print a little bit softer than your straight palladium prints from the
same negatives.
Processing is very different from silver (or Pt). Very basically, you
rinse, fix, and tone (gold usually). Chicago Albumen works sells kits
and supplies and furnishes instructions. Bostick&Sullivan has all the
supplies as well, and I think Photographer's Formulary does: easiest to
check their respective websites and see what's available.
I hope some list memebers with more direct experience of
silver-gelatin-POP will add some more specific details about the wet
procedure, especially toning.
---Carl