It can later be washed off quite easily. You can also use rubbing alcohol and a cosmetic sponge or cotton ball to gently swirl the paint off. Wear rubber gloves and wash the stencil off occasionally. Brushes - Wash brushes in a bucket of water. The liquid can be dumped out and the residue can be collected by paper towels and disposed of.
Brushes are easier to clean if the paint is fresh, and a brush scrubber is handy.
For acrylic paints and the Easy Blend creams, Murphy's Oil Soap or dish detergent work well. If the acrylic paint has dried or is at all stubborn, use either Formula 409 or regular isopropyl alcohol to remove it. Pour in a bit of the Formula 409 or rubbing alcohol and let them soak for awhile. Then, just rinse them. Be sure to let your brushes dry thoroughly before using them again.