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Metal is tricky to paint in the cold, so you may want to wait till it warms up. I am also assuming that their is no current peeling and the existing finish is not glossy.
You also want to tape off the bottom gasket so you don't get paint on it. As for the inside of the panel edges, I would advise not to paint them; with acrylic paint on aluminum, they tend to stick even when dry and will pop when you open the door.