Winsor & Newton - Oil Alkyd - Gloss Varnish - 500 ml - Winsor & Newton Artists Gloss Varnish is a modern general-purpose gloss varnish which dries to a non-yellowing glossy film. Designed to be applied to a dry, finished painting. May be mixed with Winsor & Newton Artist's Original Matte Varnish to adjust the degree of gloss.