RE: Locking Diffs
It might work - But I would think with no lubrication at all, there might be some issues later. I would not try it.
THe Spool you can get for $10 american off Ebay with less the $2 shipping. Sometimes you see buy it nows for around 11 or 12 american dollar. They are cheap.
I have heard some people using JB Weld or Silly putty in their diffs. They post here about doing it but never post the results.