Painting Aluminum Window Wrap . Please let me know if you have comments. Use a suitably small paintbrush to apply, ensuring all excess paint has been wiped off. New windows and aluminum trim wrap Complete Service from www.complete-service-builds.com It needs room for expansion and contraction or it will ripple, buckle, or bulge. Apply spray paint color of choice in multiple layers. If you need to remove the exterior trim you can do so by using a wood wedge and place it so that it rests against the wall behind the trim so.