In this video, Jimmy DiResta shows us how he created these beautiful leather wallets for Carolina Boots. To create the unique die stamps for this project, Jimmy engraved a piece of Corian® countertop material with his designs. You could also try creating die stamps like this with a 3D printer, laser cut acrylic, or wood that's been carved with a CNC. And while Jimmy uses a fly press to stamp the leather in this video, you can really use anything that will apply a good, even amount of pressure to your die stamps.
