I know how difficult it is to get a likeness, especially Keaton. I did a lifesize face insert sculpt for an 89 cowl some years back and had to look at a ton of references to get it Keatonesque, so I respect the attempt.
I think it's missing more of a pout and the lips are slightly too small and the face a touch narrow.
I photoshopped my sculpture in this cowl just to show a bit of comparison, and again, I'm not saying my sculpture is better, just a reference of what may be adjusted.
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