How to remove plastic-y film from stone tile I just purchased?

We just purchased some lovely stone tile, but a few (as in about 30) of the tiles are covered in a plastic-y film that is nearly impossible to remove. The plastic-y film is in a cross-hatch design. We can try and pick it off with our fingernails, but most of it is stuck tight. We tried soaking a tile in water to see if it will loosen, but nothing. Any ideas of how to remove it without damaging the delicate golden stone?|||I would recommend using sulfamic acid, it is sold at the Home Depot or your nearest Lowes. Don't be afraid, it's not hard to work with it. Just mix a gallon of water with 4 tablespoons of the acid, and then apply the mixture to your natural stone(s), just do not allow the mixture to sit for over 10 minites on the stone. While the acid mixture has sat on the stone for a few minites, take a hard bristle brush and scrub the stone tiles. After that, let the mixture sit for about 2 to 3 minites, and then wash the area with clean water, using a sponge.Good luck.|||try steaming it that might work hope it helps|||try some lacquer thinner|||Goo Gone. You can get it at any hardware or discount store. It works on anything sticky or oily (usually).