I take it you are referring to the mu-metal alloy of nickel, copper, etc... I would like to try to find it in granular form and stuff in vinyl tubing surrounding some diy silver interconnects. I would think that the shielding properties and the inherent dampening offered from small granules (like sand) would be awesome. Heck, if you can give it a shot..go for it I say. I've been thinking about this type of thing. Actually, if you have it available to you in a sandy consistency let me know. I would totally enjoy doing a little r&d with it.