We used to have a few that got greasy pig. They are best culled, because they suffer terribly and never do amount to much. Their skin eventually falls off, and they stay a runt all their lives. As far as I know, there is really not a good treatment for it. Prevention is the best, and by clipping the eye teeth on the newborns you will prevent most of it.
These pigs are about a 100lbs now so from what ive read I can still save them. Today I gave them there first shots of medicine so ill post pics tommarow.