First off, I have to say when I was shopping on Wayfair that day I wasn't looking for weather resistant outer space alien statues.   I don't know if this is the thing you every set out to search and buy, but I have to say when I saw them I thought they were awfully cute.  I placed these hopefully peaceful invaders on my retaining wall in the backyard and they certain get second looks from people and pets.  They are not metal, but seem pretty sturdy.  Hopefully they will do well in the weather being outside.  The truth is out there.