I just did my fenders it was simple use dental floss to cut the adhesive and then pull it off...you will need to clean off residue from the backing off the fenders and then figure out how to cover or fill up the holes
My car is at the body shop getting repaired. I've asked them to debadge it. They're welding the holes and repainting. This would probably be more than you want to spend but is the "right" way to do it.