Pd is $2536 per oz currently, and is in deficit because there are only a few few deposits worldwide USA has (stillwater mining corp) but most of it is mined in Russia (Amplats), and South Africa I have no idea who owns that supply probably China
Economics of the scheme probably turn on whether the active region is only skin deep, or operates throughout the bulk of the material. A plasma deposited surface coat on a supportive material would do wonders for stretching a limited resource.
Fortunately, the Japanese have discovered massive off=shore deposits in their territorial waters. Far larger than currently known supplies.