Golden Artist's Acrylics offer a final varnish for protection of acrylic paintings. Golden Varnishes unify the painting with an even optical reflection. Non-yellowing and bloom resistant. Prior to actual use, it is very important to experiment with Golden varnishes on test pieces to become aware of how they perform and how they alter the surface appearance of paintings. For best results, apply to a test piece that is similar in composition as the artwork to be varnished. This will help ensure that all variables are accounted for, and a successful varnish application will be achieved.