I think Platine is rather standard paper people use for Pt/Pd printing and other iron-based processes such as Kallitype and Vandyke. If you look the archive, one gets an impression that almost anyone who prints Pt/Pd uses this paper. The other option is COT320.
The only thing is the cost. There are more economical papers which print nicely too. I would certainly suggest Platine to someone who is rather new to these processes. It simply works great.