As Deus said, there is no such thing (from a physics standpoint) as centrifugal force. It's just inertia. If we're going to discuss physics of movement, then any sort of meaningful benefit will hinge upon a correct understanding of the concepts and terminology.
To deliver force as from a strike into an opponent, that opponent must either be in the path of the rotating object (as in a hook punch) or the force is generated on an arc and the limb flies out from the arc off a tangent to it (as in twisting the hips to generate force for a cross).
You could grab your opponent's ankles and swing him in a big circle then let him go so he lands on his head. In that case, the centripetal force would be the effort to hold onto him as you spun him around, when you let him go and he flew away that would be inertia, and when he crashed to the earth that would be the combined vectors of gravity and the equal-opposite reaction of the earth pushing back against him as he smashed into it.