The shape, width and quality of the brush are to a great extent qualifying the effect you can achieve with it. For instance, round brushes are ideal for making curves and drawing curls. You draw straight lines preferably with a flat brush, keeping the handle of the brush pointed in the direction of the line. To draw a thin line, you do not necessarily need to use a narrow brush. You can also use the edge of a flat brush for that. This brush is also very convenient for making a thick line merge into a thin one, turning the brush on its side in one fluid action as you go automatically changes the line from thick to thinner.
Work from dark to light and use the darkest colour on the inside of the wings.
Create the inner part of the wings with Water Make-up Pure 601 and brush IMP8. Doing this, work from the inside to the outside.
Then make the middle part of the wings with Water Make-up Pure 508 and brush IMP8. Make sure that both colours blend into each other nicely.
Apply the white on the outsides of the wings with Water Make-up Pure 001 and brush IMP8. For this, it is important to only work from the outside to the inside.
