This oil medium makes the paint spread easier, go farther, and dry faster. Oils can take days, weeks, even months to dry without a medium that speeds drying time. I recommend Liquin for our purposes in class. There are many mediums with different properties, but I’ve found Liquin to have a reasonable drying time (overnight) and has a movability and texture that resonates with most people. I’ve used it for over 35 years, and most of my professional oil painter friends do as well. To purchase Liquin, click here.