Gamblin Cold Wax
Cold wax can be used to make oil colors thicker and more matte. A soft paste formulated to knife consistency, Gamblin cold wax medium is made from naturally white unbleached Beeswax, alkyd resin and odorless mineral spirits. It can be thinned to brush consistency by dissolving in a small amount of mineral spirits.
The surface of paintings made with beeswax mediums will become as only hard as a beeswax candle. Adding galkyd to cold wax painting medium/oil colors mix will increase the sheen and flexibility of the paint film. Use a small amount to make galkyds more matte.
Gamblin cold wax medium contains no oil so it can be applied as a wax varnish over a dry oil painting.