The amusement parks in the Six Flags chain put advertisements all over. Six Flags America doesn't have ads on any of the coaster trains (at least not yet), but they do have a giant banner on Wild One's lift hill.
Here are examples of coaster trains that Six Flags wrapped in ads: A Boomerang in Texas, a Boomerang in Massachusetts, a stand-up coaster in Georgia, a looping coaster in Georgia, a Boomerang that was recently removed from Texas, a bobsled in Texas, and a looping coaster in Missouri.
