Ruling Pen and Masking Fluid for Watercolor Painting

A ruling pen is the best way I have found to apply masking fluid in thin lines in a watercolor painting. CHAPTERS 00:00 A ruling pen for watercolor paint and masking fluid 00:33 Using watercolor paint in the ruling pen 00:53 Painting grass and tree branches with watercolor and a ruling pen 1:48 Straight lines using a ruler as a guide 2:46 Using a ruling pen to apply masking fluid 4:57 Grass and tree branches in masking fluid 5:24 Simple clean-up 6:04 Removing masking fluid A ruling pen is a drafting tool. I got mine in a small drafting set and have really enjoyed using it to apply masking fluid when I need thin lines or detailed marks. Clean-up is also a breeze! The masking fluid I'm using is called Tear Mender.