Animated Whiteboard Hands in Storyline 3

I'm working on a small whiteboard animation in SL 3. I have the hands and can make those slide my objects in and out, etc.  using motion paths. I want to have both hands come up and "Clear" the whiteboard. (Like I'd wipe a slate) I cannot figure out a motion path that will allow me to do this smoothly. I've tried states but can't seem to rotate the hand to portray it's moving from one side to another. Has anyone done anything like this in SL 3 that you'd be willing to share? Thanks!

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