To paint solvent-free, use Gamblin Safflower Oil to clean brushes while you are working. After your painting session, brushes can be further cleaned using Gamsol and/or soap and water. Safflower Oil is a pale, slow-drying oil. When used as a painting medium, Safflower Oil increases flow and slows dry times. Use sparingly or mix with an equal amount Gamsol to create a traditional slow-drying, low-viscosity painting medium.