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