I am currently using Arches Platine, which is advertised as being created for alt-process photographers especially platinum, and is suposed to be already sized. I currently use it for cyanotypes and like it and it is also available locally. The book " coming into focus" states that paper may or maynot need sizing but that it will certainly improve the print.
So does anyone out there have any experience with this paper and can recommend applying more sizing or not? Thanks