do you mean off completely? or on/off during the animation?
I'm not sure if you can do it during animation - you'll have to have a duplicate object, one with on, one with off, and toggle their visibility (either manually or with a switch layer)
I applied it from the pull down script Menu, it applies the effect to all the layers, but you were right to suggest disabling individually in each layer.
Thanks! I just took the plunge from Moho 5 to AS 7 Pro and there are some new procedures to learn.