Perhaps he was referring to stainless seed plate, you can read it here: Stainless steel Bitcoin Recovery Seed Plate.

Yeah, I think paper wallet is suffice, but as @Welsh mentioned you have consider several factors, might be good to have a safety storage box for your safekeeping in a bank if you can have that option as well.

Just remember though that it's not 100% guarantee, this kind of setup has it's drawback and you really have to prepare for the worst situation.