How do i remove car paint off plastic? read additional details..?

i think its called Polypropylene plastic. its similar to the plastic from plastic milk bottles, but thicker..





i scratched the front bumper of my car on a curb, so i sanded it down and sprayed it. some of the spray got onto the plastic underneath the front bumper. i dont know what to use to get it off? its blue paint on black plastic..How do i remove car paint off plastic? read additional details..?
the easiest fix is to tape off the black part, scuff it with a Scotch Brite pad and repaint it with a spray can of semi gloss black paint.How do i remove car paint off plastic? read additional details..?
Your right it is polypropylene now back to the question you can go to a paint store and they can get you something or try autozone or advance and you might be able to find something there