credit card under the plastic strips, very slowly cut through the glue with the card and they should come off whatever you do dont rip them off as the paint may come off with it...take it steady but not too slow after there maybe some glue still stuck to the car just keep scratching it off with your nails or get some t-cut an rub like hell. should come off but not in a hurry just take your time. very easy job to do, same with taking badges off i.e the micra one on the boot and the twister one.
There is always my way of de-striping:
Get a flat screw-driver and shove it under the stripe near the front,