eh, guess no one seem my post a little while back but i was not in a hurry to know back then. so i'll ask again.. tomorrow i'll be painting my bumper which is plastic.. so i was wondering how to apply rustoleum to plastic, dose rustoleum adhere to plastic good or do i need to prep it some how to stick good? (same goes for rubber)

i know they make spray paint just for plastic.. i know plastic has a fit with some paints adhering so should i use http://www.marcospecialties.com/mmMS/Images/Fusion2320_100.jpg as a base coat to cover the plastic then go over it with rustoleum or would the rustoleum cover plastic without a problem?