A: This is a GREAT home repair question. No need to replace it. You can paint your aluminum siding. Aluminum will last forever. Paint left on any surface will oxidize over time.You just don't see it on wood because the paint peels before it oxidizes. The cure for the siding is to power wash the oxidized paint off as much as possible.Sometimes brushing it off as well. Then simply paint two coats then you are good for another 25 years. I recommend a satin finish to restore the metallic look.