Just from going through the forum at dipyourcar.com that seems to be what people have experienced. Some just put on another coat after a couple years and keep going. But of course after a while it'd be too thick and need to be peeled.
I was really skeptical at first but after a lot of digging around, it's a pretty decent option...EXCEPT I want to put a stripe kit on my Duster and this "dipped" finish I think is too textured to lay a large decal onto. So I don't know....