Shake well before use. Apply your streak with a fine pointed brush in irregular vertical lines from upper parts on sides and let the paint dry for about 10 minutes. Next take a flat brush moisted in White Spirit and swipe with little pressure over the earlier applied streak to soften the effect and create a natural look. Easily imitate the streaking dirt for example in a Dark Yellow or Grey paint, using this color. Use a fine brush to draw the lines and a thick flat brush dampened with White Spirit to stump the lines