Fabriano Aristico will require acidification.
I use a 10% solution of Oxalic Acid (100g per liter), and brush coat this onto the paper. You can use your coating brush - there are no issues as long as you rinse it afterwards. I don't count drops -- just dip and coat until you have covered the surface. You will see little gas bubbles in places where a chunk of basic coating is neutralized. Just don't put so much on that oxallic acid is crystallized on the surface after drying.
After coating the paper, hang and allow to dry. Keeps forever.
There is no need to wash the paper subsequent to the acidification.