Copper, copper and copper. Three different materials. Copper on mylar. Looks too unnatural to me. Goes on easy but it is also not durable. The copper itself is ultra thin so it does not take much to ruin the finish as you can see middle bottom. So with that out of the running I have a copper foil. It is not self adhesive so I will need to put on some adhesive. 3M 77 comes to mind. or 3M photo mount. The third alternative is copper tape. I have found it in 4 inch width. I did try some 2 inch which is the same stuff I used for shielding the body cavity on my Termite Tele. But tape will not be a smooth as the other two products.