they are stick on - no holes! Me and Martyn removed them off his Punto a wee while ago! not sure how he actually removed them, though presume it was just pull off!? You would have to ask him personally... However, once they were off, it was just a bit of glue along the door which we got off with de-bud spray and an old student card.... simples
bear in mind it wasnt a grande punto he had actually, so might be different...