Thanks for the help guys. I did the same. I used a small plastic tool used for opening Zunes and IPhones. Shoe horn in one side of the flare through the hole. Pushed the bumper towards the side that was through, (careful not to push hard enough the shear off). Then work around. They were all a little different so not sure there is a single technique. Some i used the plastic tool like taking a tire off rim. Some I was able to keep a grip with fingers tips. I did prep bumper with petro jelly. Over all not horrible. Turned out fine with none twisted off. Oh and yes i had the form/cover off. Id just gotten the pan painted.
Thanks again