You could have it powedercoated. That would be the most durable.

You could spray paint it and if you use a good primer and paint it
should be OK. It would need to be cleaned well and maybe scuffed.

Ken Hall wrote:
I have an aluminum patio door. It's natural aluminum and looks
crappy. Can it be painted white? If so, is there some special paint
for aluminum? How about the tracks and sides where the door slips
into -- won't the paint wear off immediately?

If it can't be painted, is there another way to color it? Black would
be fine. Actually almost anything other than a yaha color like apple
read or vibrant green or yellow, etc. Let's say, restricted to
earthtones.

Ken