will this work??? primer on a front or back bumper its plastic and all but will it stick crack i know itll stick but wil it crack eventually:?

 

How much do you really plan to flex your bumpers? If you twist them a lot it will crack. If it's a big deal you can use a real spray gun and put flex additive in the paint... or you can purchase flexible paint in a rattle can at an automotive paint store. The effect of the flex agent wears off with time though....

 

you should be good im rockin rustolium primer and it has not cracked just a few chipps... and who cares if it does crack or chip just go grap the can and hook it up and your good to go