Cobra glazing medium makes the paint smoother. The added amount influences the degree of transparency. We call this technique - making colored transparent layers of paint without brush strokes - glazing. Cobra glazing medium is very greasy and may only be applied in the last layers of a painting. The medium increases the gloss level and durability of the paint film, but has no effect on the drying time of the paint. Cobra glazing medium is based on vegetable oil. You can also dilute it with water.