The 2.0 MM Molotow™ Grafx™ Art Masking Liquid Pump Marker is great to mask your paper from inks. It has a 2 mm fine tip.
It is a light blue masking fluid so you can see where you have applied your mask. It is water-based, so covering an area that already has water-based ink may cause bleeding. The mask is easy to peel off. Remove mask within two days from surface.
Instructions: Shake well. Pump softly. Write.