Skins are generally not reusable but your mileage may vary depending on the removal technique and the length of time in which the Skin was stuck to the device.
Some customers were able to interchange and reuse various Skins continually, using the backing card as storage, but we advise customers to remove a Skin only when they are certain that they do not want it any more because the Skin is likely to stretch upon removal - especially so at the thinner stripes and if it was left on for a long time.
Just peel the Skin off when you're done and marvel at how well the Skin protected your device as it will look just like it did before the Skin was first applied.