None of the Canson papers will work well, in regards to scratches. They are very delicate. Platine possibly even worse than the Baryta.
For this project, I would recommend, moving back to RC, use Epson Luster 260W. Your true pure glossy papers are all going to scratch with a cold roll technique. Epson luster is pretty hardy, or consider Moab's Lasal 300W luster paper.
If you heat mount different story, I have mounted both Platine and Baryta, more Platine on 1/2 foamcare and gator using Beinfang ragmount with great success.
Paul