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xkcd #2929: Good and Bad Ideas
(imgs.xkcd.com)
Alt text:
While it seemed like a fun prank at the time, I realize my prank fire extinguishers full of leaded gasoline were a mistake.
No, they don't change inside (I've had them). They do have a slight tint all the time though, which isn't a big deal.
Was it long ago? Mine have no tint