I like Phase IV paint, especially on the Superliners. The "paint," which really appears to be a giant sticker, on most Superliner I cars is starting to peel off, showing the original Phase III paint. The first time I noticed this, I thought there was orange underneath the silver, but it was really the red from Phase III. It's actually a good way to compare the two paint schemes, especially in Phase IV's blue area, as the blue sections of the two schemes overlap. I wonder what the pointless arrow would look like with the darker, Phase IV, colors?
As a side note, in the right light, you can see the original "Amtrak Superliner" (with Superliner in cursive) and numbers underneath the Phase IV paint. They just stuck the Phase IV paint over the Phase III paint.