THIN PAINT IS GOOD FOR ADDING HIGHLIGHTS:
A thin paint works especially good when adding highlight colors. When mixing paints for a highlight application the paints should be thinner than the paint already on the canvas. The rule of thumb is: a thin paint sticks to a thicker paint, especially when adding highlight colors.
Thin the paint with LIQUID WHITE, LIQUID CLEAR or ODORLESS THINNER. The rule to remember here is that a thin paint will stick to a thicker paint.