Follow our application guide for the best tips for applying liner with am eyeliner brush. Lily Lolo Cosmetics provides some of the best tips for applying eyeliner with a brush. Start by prepping your eyes, choosing the right brush, and using the right color. Begin with a thin line, and gradually build up the line until you get the desired effect. Use short, feathery strokes for an even, natural look. For optimal results, use a primer before applying the eyeliner. With these tips, you'll be able to achieve perfect eyeliner looks every time.