Matte & Satin Picture Varnish Spray for Oils: These acid-free, solvent based spray vanishes are for use with oil paintings. The fast-drying varnish should only be applied to paintings that are completely dried & cured (at least 6 months to 1 year). The thermoplastic film allows for the possibility of restoration. Non-yellowing. Retouching Spray Varnish for Oils: This acid-free aerosol spray varnish is composed of acrylic resin and polymeric plasticizer. The thermoplastic film allows for the possibility of restoration. Apply only in thin layers. Dries quickly (approximately 15 minutes) and offers temporary protection.