Gamblin recently released their newest product, 3-in-1, a lean oil painting medium designed to support multiple stages of the oil painting process. It’s versatile enough to be used as a ground or size to seal wood panels before paint application, and it can also be used to restore depth and vibrance to dull, finished paintings.
I was especially curious to test it out as a substitute for traditional oiling out, replacing the classic 50/50 mixture of Gamblin Gamsol and Gamblin Galkyd. For oil painters, oiling out is a key step in the finishing process. It helps even out surface quality, correct areas where the paint has “sunk in,” and very importantly, it creates a barrier between your final paint layer and your varnish. This ensures the varnish adheres evenly and the paint remains undisturbed.
Gamblin’s 3-in-1 has a very lean consistency; runny and almost watery, unlike thicker mediums, which are more viscous and sap-like. I waited 4–5 weeks after completing my painting before oiling out with 3-in-1.
First, I wiped the surface clean with a lint-free cloth, then applied a thin, even layer using a flat brush. Instantly, it brought the painting to life. The surface evened out, and the colors, especially the dark tones, became richer and more saturated revealing a ton of luminosity. After allowing 48 hours to fully dry, I applied Gamblin’s Gamvar varnish as the final protective coat.
I’ll absolutely be using the Gamblin 3-in-1 moving forward as my go-to oiling out medium. It eliminates the extra step of mixing your own Gamsol and Galkyd solution, letting you cut straight to the chase and watch your painting transform.
Happy painting, everyone!