Gamvar Picture Varnish saturates colors in your painting and gives your work a unified and protective surface. Developed in collaboration with the National Gallery of Art, Gamvar goes on water-clear, stays water-clear and can be easily and safely removed with Gamsol. Gamvar is virtually odorless and ready to apply. Brush apply. Do not spray. All Gamvar can be applied when the thickest areas of your painting are thoroughly dry and firm to the touch.