Aluminum siding is an older version of siding that has been around since the 1950s. Aluminum siding is often very lightweight and the outer protective shell of the home. The downside is that it oxidizes very easily so the colors fade as it becomes chalky from the breakdown of the metal surface due to sunlight. Homeowners often have fading, which leads to the colors becoming old and dull. Due to the age of Aluminum Siding the colors are often dated.
The good thing about aluminum siding is that you can paint it any color you want with the proper prep work. Proper prep work includes a good power wash with a tri-sodium phosphate and bleach solution that removes the chalking residue. Chalking can be found when you touch the paint surface and you have chalk left on the oils of your fingers; if you try to paint over this without the proper power wash, the paint will actually bubble, peel and fail within weeks.
Once your home is power washed, let the solution dry, apply 2 coats of a good acrylic latex paint; sometimes you should add emulsa bond into the paint to give it flexibility and adhesion, as a result it will last 10-15 years when painted properly. The best way to paint aluminum siding is with an airless sprayer that leaves a nice, smooth, factory-type finish of the new color on the aluminum siding and prevents any type of brush strokes or roller marks. When doing aluminum siding, a true professional painter can prep it and make it look like a great factory finish which lasts a long time.