Digital BW, The Print

Huys, I am starting a new project to print work onto some hand made
paper / Oriental art paper. The B&W will be printed using 4 or 6 ink
set and then handcolored with artist pastel. This is an art project.

I recall some suggest preparing the paper surface before printing with
some form of spray to prep the paper surface. Just like to know if
anyone do that, and what kind of stuff is used for that. Need link and
names also

Regards
Franka