Gamblin Videos How to varnish with GamvarGround and Gesso Blade Curious about how our colors are made and the people behind your paint? Tips for working with GamsolThe Basics of Oil Painting by Lena DanyaColor Mixing: How to paint realistic skin tones by Lena Danya Authentic color. Naturally.Gamblin Approach to Colormaking Oiling OutOil Painting Mediums