I would like to have some kind of material or compound that can resist the flow of magnetic flux, similar to a resistor in electricity.
multiple layers of ferromagnetic sheet metal each of which is grounded. the sheet metal will develop electrical currents when exposed to a EM field and if they are grounded they will absorb the field by turning electromagnetic energy into electrical current.
There are some specials powders you can mix with just about anything.epoxy, etc. that you can spread which will do this.
I think a box made of a ferromagnetic material, like iron, would do it. If you had a box made of iron sheets, no magnetic field lines from outside the box would penetrate inside. It should be kind of like a Faraday cage, only for magnetic instead of electric fields.
The problem is that it's a Toyota
