All disks contain platinum

[butcher]

sounds like you may end up with a gooey mess in that cell.

 

[Marcel]

Why dont you just use a lathe and take a thin layer off every platter?
That will minimize chemical recovery at least.
I sold mine a few months ago on ebay, but I dont have many platters anyway. But if someone tries this out, maybe he can report back on the yields etc...