All my kittens have been using their sisal wrapped scratching posts since they were 6 or 7 weeks old . . . I have been raising my Spoiled Babies for 32 years and learned a long time ago that if you have something that they like and focus on that is dis-similar from your furniture you won't have any casualties . . .
and they are already used to having their "pedicures" (usually in the evenings while we are all here in the living room watching TV).