Is there a general explanation of the limits of vampire regenerative abilities?
Throughout the Buff and Angel TV series, Angel and Spike were constantly being pummeled, shot, and stabbed and then subsequently bandaged up for the remainder of an episode, or magically healed in a following scene. It's very inconsistent. For example, in the Angel episode "Sacrifice", Angel is stabbed through-and-through with a particular demon's appendage, yet in a following scene, he appears completely healed (though his shirt is still in rags).
One scene in particular raised an interesting question in my mind: in the Angel episode "Damage",
Spike's hands were cut off. Would they have eventually re-grown on their own?