Gamblin GAMVAR Picture Varnish
Gamvar saturates and gives greater depth to the colors in your painting and gives your work a unified and protective semi-gloss 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. Gamvar can be applied when the thickest areas of your painting are thoroughly dry and firm to the touch.
Why varnish? Painters varnish their work for two reasons. First, it is a way to control the surface sheen of the painting once it is finished. Second, a varnish serves as a protective coating. A painting, like the walls in your house, becomes dirty over time. Or worse, if there is smoke damage or the painting were accidentally splattered with a foreign substance, the varnish is what would be affected, not the paint itself. If you try to remove a foreign substance from an unvarnished painting, you risk damaging the paint surface. But when you remove a foreign substance from a varnished painting, you are only removing the varnish, and are able to preserve the integrity of the paint surface. Then, a new varnish can be applied.