Liquid masking fluid is a fine art supply which can be a very handy thing to have at times. You can use it to mask small areas or large ones. When using Masking Fluid, get a little jar with soapy water (I use bubble solution since I always have it on hand), a glass of regular water and your brush. Dip the brush in the soapy water, lightly touch it to a piece of paper towel (to remove excess), then dip the soapy brush in the masking fluid and paint it on your cardstock/surface where you need the mask. Rinse brush in water, dip it in the soapy water and touch to the paper towel, dip in masking fluid, and paint on cardstock/surface as needed. Repeat until the entire area you want to mask is covered and let the masking dry. This will keep the masking fluid from gunking up your brush and ruining it. It also helps the masking fluid flow more freely off the brush onto the surface. Don't leave the masking fluid on your project over night, otherwise when you go to "peel" it off..it may tear up chunks of your paper. Add color as desired to your project, let it dry, then gently peel/rub off the dried masking fluid. If you have applied inks on top of the dried masking fluid, be sure to use a paper towel an dab off the ink from the dried masking fluid before remove the mask.