Update: Masking fluid keeps damaging my watercolor paper
Lately, I've seen a bunch of painters at our local art group apply masking fluid to keep white areas in their work. I tried it myself, but when I pull it off, it often tears the paper. For example, I was painting a beach scene last month, and the fluid ripped right through where I wanted smooth sand. Has anyone run into this problem before? I make sure the fluid is fully dry before I paint over it, and I peel it off slowly with my fingers. It's annoying because all my friends have great results with it. What can I do to stop the paper from getting ruined?