Space Junk
I didn't really know where to begin with drawing UFO pieces, so I turned to looking at old B-movie spaceships and noticed they were usually chrome with large bolts in them. I made some roughly torn looking outlines of metal as well as a small hula toy at the request of some team members.
I'm fairly certain I managed to get the look of torn metal right, for colouring I used a couple of layers with some low opacity colours to help blend them together. I also decided to make the inside of the parts a type of metal mesh to make it look a bit more "spacey".