Anything Spirit based, Meths, white spirit, etc. Apply to the panel via a rag, every minute for about 10 minutes, this will break down the adhesive properly, and save rubbing the skin off your fingers! lightly Tcut or similar the area after removal, to bring the paint back to life that surrounded the badge, also cover up the bumper, spirit may stain the plastic!
Use the spirit in a well ventilated area, and use gloves and goggles etc

Looks like the culprit was left handed! if that's a scratch on the panel!
Thom