Well, Lime is very soft and easily dented. It is worth nothing also that for large(ish) thin bowls there is a risk of depressing the foot back into the bowl if the tailstock is applied too severely. For these cases I always use a lump of poplar turned into a rounded cone with a flattish tip. This will allow the inside bottom of the bowl to sit on the rounded cone, and the pressure of the tailstock has no chance of depressing anything.