The Worse Ever

In my short metal detecting career I have found some mighty ugly coins.  My best of the uglies became an 18th century Russian 5 Kopeks.  It was so ugly that I thought it might have been a fossil!  But, in showing it I received quite a few comments about it not being a find at all!

So, here is my next worse ever, as found:

I already know it is an 1898 Liberty Nickel.  So, now to find a way to clean the crusties off.....