I dipped my bumper a few months back. It looked pretty sweet but the dip started to pull back near the license plate, almost as if it shrunk. I did the dipping outside on a windy day, I was told it's better to do large areas indoors, so that's why it didn't last.
I pull a jayco pop-up from time to time and the occasional trip to the hardware store. Brought a nice load home from Lowes the other month for some landscaping!