Found it interesting what this seller does to "restore" his nickels:
http://www.ebay.com/itm/Key-Date-1914-D ... 2eba2b603d
I think I have a 1914-D somewhere about in my coin miscellaneous box. It is all corroded. Probably will not acid-treat it, but is there any numi worth to a readable date, corroded 1914-D nickel?