Aluminum windows can be painted, but there is some preparation required. The windows must be clean, free of stains and properly primed with a metal primer.
The process begins with the cleaning of the windows using a mixture of hot water and mild soap or detergent. After cleaning, cover the windows with a lubricant and scrub to remove any stains before wiping it down. Prior to the application of a metal primer, tape the edge of the window. Apply a metal primer base next and allow it to dry before continuing. Last, apply paint and allow to dry before assessing the need for an additional coat.