Atelier Acrylic Varnishes are non-toxic, self-leveling and can be used either as a medium to change the sheen levels of acrylic paints or as an over-varnish for acrylic painting. Provide a non-tacky protective coating. Atelier Matte, Satin and Gloss Varnishes are creamy, mid-viscosity products made from hard acrylic emulsion. They are non-removable, however they can be over-painted.