The Moai needed about 10 minutes with 320 to clean it up, except just under the chin. I used a .25 BN 0.009 stepover at 50 IPM feed. What happens with this setup is that when you get to a plane that’s almost, but not quite vertical, there’s a little cusping that happens. I ran a fine file over this before the 320, which did the trick. Another option would be to create a separate vector for just that area with cusping and reduce the stepover to something like .001. This wouldn’t add that that much machining time as the area is so small, but I was lazy 
Another, better, option would be to build a jig as Dennis VanHoof created in this video
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