Heidi Swapp Masks- (Opposite of a stencil)

"the possibilities for these are limitless. the re-useable, flexible, washable material has a repositionable adhesive on the back, so the mask will stay as positioned while you are working. place the mask onto any surface as desired and apply any medium over the top. try mediums such as: chalk, inks, acrylic paint, dyes, watercolors and even dimensional paints."--Heidi Swapp

A mask is the opposite of a stencil