I rattle canned my truck just over a year just to get a different color on there. I gave it 3 healthy coats and prepped it properly. It has not moved, but has been sitting out in the elements, and its peeling pretty badly in quite a few spots. Once the wiring is done, I will be spraying it one panel at a time.
Basically, dont be upset when it starts to peel in the not so distant future.