system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are most jetliners painted white?
gpt
In addition to the paint being cheaper, the weight of the paint can actually cause the plane to use more fuel. That's one if the reasons American Airlines (used to) keep their hulls unpainted. Getting the aluminum buffed and nice looking was expensive, but still cheaper than the weight of the paint over the course of the aircraft's life.