I've done it myself plenty of times. I actually do it with a heat gun; much hotter than a hair dryer but it's faster. Decks don't suffer anything if you do it carefully. Avoid getting too close and stressing the cellophane with the heat, because it may break. If anything bad is happening, the cello is the first to tell you.
Try on some cheap ones to get the hang of it but it's not a big deal.