Gamblin Gamvar Picture Varnish 16oz is a ready-to-apply low molecular weight synthetic resin varnish developed in collaboration with conservation scientists at the National Gallery. This virtually odorless varnish saturates and gives greater depth to colors and gives work a unified and protective semi-gloss surface. It goes on water-clear, stays water-clear and can be easily removed with Gamsol.The 2 oz. bottle holds enough varnish to cover 40 square feet, the 4 oz. bottle will cover 80 feet, the 8 oz. bottle, 160 feet and the 16 oz. bottle, 320 square feet.