6.Unless you plan on going crazy with the liner to overdraw your lips, you'll want to start easing away from darker shades, which make your lips look thinner.
9.Basquiat was a master colourist and would use oil stick with spray paint, crayons and acrylics, undiluted primary colours layered in rapid succession — and he would build his figures up by reinforcing and overdrawing every line and form.