Dude I highly recommend not taking that trim off unless you want to buy all brand new pieces. You CANNOT reuse the old trim once you take it off. Your best bet to fix the chipping is to tape around it, sand the hell out of it, then spray it black with a thick epoxy paint, something durable such as VHT epoxy or the like. You can also sand it, and use Trim-Brite vinyl trim blackout tape to cover it. Up to you man, but I highly recommend not messing with taking it off.