this stuff works on most any stain, it should work on ferretvite - kinda
expensive, but last a long time and much cheaper than buying a new
wardrobe:
 
AMODEX STAIN REMOVER
 
http://www.fahrneyspens.com/item.asp?UID=2005100901343193&item=AHB
 
Nan and Jubal and Early
[Posted in FML issue 5025]