To make Gamvar Gloss less shiny, add 20% cold wax to the Gamvar by first making a slurry on your palette with the cwm and a little Gamvar. Add the slurry 20:80 (2 parts CWM, 8 parts Gamvar) with Gamvar and it will be more satiny. Only use Gamblin's Gamvar Varnish on paintings that have a ratio of cold wax medium to oils that is less than or equal to 25%! If you have used a higher ratio of cold wax medium to oil paint, use a final coat of plain cold wax medium as your varnish!