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Peel back the backing at the top of the over-laminate sheet and line the top edge of the laminate up with the top edge of the vinyl paper. Use your fingers to press the laminate onto the vinyl paper so it sticks. You can find over-laminate online or at your local office supplies store. Press the laminate onto the vinyl paper as you go. Keep going until you've peeled off all the backing and the whole sheet of vinyl is laminated. To prevent air bubbles, use the edge of a ruler to press the laminate onto the vinyl paper. Use a ruler and a craft knife to make precise straight cuts. If your sticker designs are rounded, use scissors to cut them out, or give them a square background. Once all your stickers are cut out, discard any leftover paper scraps. The vinyl backing will be on the opposite side of the over-laminate, on the back of the sticker design. Grab a corner of the vinyl backing with two fingers and peel it back until it's completely off the sticker. Place your sticker on a dry, flat surface.
Apply an over-laminate sheet over your stickers. Peel back the rest of the over-laminate backing slowly. Cut out the laminated stickers from the sheet of vinyl. Peel off the backing on your stickers to use them.