Hi Haystack Hair! It came from an aluminum container. Hey, Mike - I tried the pop can, too - it's tougher to cut, but
thanks for the suggestion. I might experiment a bit more from another source, but I'm definitely taking the aluminum
sheet route as everyone suggested. It does make it easier easier to model the wrinkles on the metal and does look
more realistic, than trying to make wrinkles on styrene, like below.
I'd say you still have to force yourself to believe it's wrinkled metal:
But with real metal there's no mistaking it for painted styrene. Even a roughly done panel looks more real to my eye.
So I sanded off the rivets on the IMU housing to make the surface nice and smooth for the aluminum skin.
And glued on the remaining panels.