Aluminium is not magnetic

I have an acquaintance. He runs a scrap yard. I was there one day when a person entered with some scrap metal.
My acquaintance asked the guy, "Is it metal, or is it aluminum?". ... Made me laugh!
Yes, on a more serious note, think about the speedometer in most older vehicles. They spin aluminum to induce eddy currents and move the meter needle and think linear motor technology.
Wonderful stuff, science!