Apply the effects using a medium sized round soft paintbrush. Deposit the wash onto your scale model around details, seams and in holes creating fake shadows hi-lighting details. Let dry for about 15 minutes then clean the excess using a brush dampened with Thinner for Washes. Use a fine pointy 00 size brush to apply more refined pin-washes where you feel they might be necessary such as in weld seams and around bolts and rivets. The efect can be used in vertical lines to create streaking effects.