Previous owner had painted the drip rails and windows, so i started to remove the paint by scrubbing with an SOS pad. It worked, but took awhile. I have to try and find an easier way to get rid of the paint. I do say there is some satisfaction in cleaning aluminum, because it looks so nice when it is all shiny. I have six of these to do - 4 windows, 1 above the door, and 1 above the storage door.