There are two options btw :> Ideas: 1. We print both sides of our parts (they'll have holes when they're finished, so we don't need to worry about that), then we put a bunch of paper in the middle (let me know which paper you used and how many layers!). Afterwards, we make it waterproof with clear contact paper. We get a random keychain (we'll have to kind of sacrifice it so it HAS to be random) and remove the metal part. Put the metal part on the matching keychains and done! 2. I thought of them having a transparent border, besides a sticker one. So if our printers are transparent paper-compatible, it'll be much easier :>