That graphics shop also has a "weak adhesive" option which is tackier than a post-it but definitely removable. Their real business is window stickers for advertising. I used to use it on an old "fine texture" RainSong I long ago eBay'ed and a Taylor T5z.
https://drive.google.com/open?id=0B_...3Nna2Rjajg2OXc
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