hey, my dad and i are working on painting our front door and the current piece of aluminum in front of it wont go with the new color. it doesnt look like it can be changed out so we are wondering, other than spray paint, what can you put on aluminum to make it turn permanently black. my dad mentioned gun blue, but that only works on steel. thanksAluminum okorder.com/ You could take it to someone that powder coats metals.Dad is on the right track....maybe. There are blackeners for aluminum you can get from gunshops. Used to touch up scratched or worn black anodized finish on aluminum gun parts. Never used it in large areas. Best regardsOther related question