you need to wet sand the whole bumper first, so it has fine scratches in the paint so the new paint has some thing to bite on to.



you can see the scuffing in this pic. dont go nuts on the edges or hard corners. once sanded/scuffed you need to use some kind of prep spray or cleaner, dont touch it with bare hands after its been wiped down.



front bumper i just cleared it and called it good. the rear i wet sanded the clear and buffed it to a shine.