Liquitex offers a broad range of acrylic mediums to inspire creativity at every stage of the painting process. Varnish mediums protect the painting surface and protects the pigments from ultraviolet light. Additionally, varnishes can be used to change or unify a paintings surface sheen. Liquitex varnishes come in several different sheens which can all be intermixed for a customised sheen. Liquitex Archival Permanent Varnish Finishing Medium is a low-odour, permanent and durable with water-based technology, translucent when wet, clear when dry and protects acrylic colours from harsh elements.Application: Acrylic paintings must be completely dried and cured for 48-72 hours before varnishing. Application may be done by brush or spray. Generally a sprayed application will be thinner, smoother and more even.