Masking Fluid Tutorial Length: 18 Minutes What is masking Fluid? How to care for your brushes, Problems as well as how to use masking fluid, using a ruling pen to apply it, sponge techniques, kitchen towel techniques and painting snow on trees. Lots of ideas for you here. Masking Fluid Tutorial Length: 18 Minutes What is masking Fluid? How to care for your brushes, Problems as well as how to use masking fluid, using a ruling pen to apply it, sponge techniques, kitchen towel techniques and painting snow on trees. Lots of ideas for you here. Watch a preview video on this page, once A SUBSCRIPTION is purchased, you'll be able to watch this and all other videos via your online account at any time. To view the full video, you will need to either: Subscribe OR Log In Forgotten your password? Not to worry. We'll help you reset it. CLICK HERE