Glazing in watercolor is a method that makes your colors glow. It is achieved by working series of colored washes. The paper is dried, rewet with water, painted with washes and re-dried, and you continue to build up layers of colors without getting muddy. Because watercolor is transparent the dry colors will show through but will not blend with the new washes. Wet Paint only mixes with wet paint, if your paper is not dry it may dull the colors that are still wet.