>>5844821One sheet at a time: put one sheet in water for 3/5 min (not too long, otherwise it'll nuke the sizing IIRC). Remove excess moisture. Put one towel on a flat surface, ensure the towel is quite flat, put the paper on that towel, put another towel on top, put a few books so that the weight is evenly distributed on the paper. Let to dry overnight.
You can try tinting the paper with ink/watercolors too; good opportunity.
And you can also stretch the paper as regular wc paper; see youtube tutorials.