Actually, you can use lighter fluid applied with a brush to the back of the card/blister which will loosen up the glue and the plastic part holding the car will eventually come off fairly easily. Because the lighter fluid evaporates preventing an 'water logging' of the cardboard, it leaves no damage to the card.It's not that difficult to cut through the glue that holds the plastic to card without it looking like it's been tampered with and then regluing it to make it look like it was produced to look like it does.