Lead has it's uses, but real tinfoil is where it's at for the mind rays.
You could easily fashion a nice lead helmet, and apply real tinfoil inside and out.
One trick for finding tin, look for it in sheets instead of foil.
I've got a much more advanced helmet, and a full suit that I use when I step outside.
My underground crawlspace/basement room has full protection applied to the walls, floors, and ceilings.
And I'll tell you I've got a lot more hair (everywhere), easy to reconfigure to throw off recognition software.