Polydactyly, or how I learned to stop worrying and love the hands.
This might be a somewhat polarizing opinion, so consider it my subjective point of view, and YMMV.
So, you are batching, sorting through the results and there is a perfect picture. Pose, expression, skin, clothing, background - everything. Well, my good chap, looks like Bob is indeed your uncle.
But then, in the back of your mind, a tiny voice whispers - something is wrong.
Something is wrong.
SOMETHING. IS. WRONG!
And then you notice, one of the hands has one digit too many.
So you do the adetailer, you inpaint over and over, you torture yourself for hours, but the better the rest of the image is, the harder it is to fix the hands. It's probably one of the Murphy's laws.
I've been there, my friends, I've been there.
Until one day, it occurred to me - hey, that hand is not malformed or deformed or maimed. It just has one digit too many or too few. These things happen in the real world. People are born with oligodactyly (too few digits) and polydactyly (too many digits) and live normal lives - hey, you got six fingers? - grab a guitar and start playing.
While these conditions do appear much more often in AI generated imagery, they are not something that should distract us - would you ignore or "delete" a living person with six digits on each hand? Obviously not. So keep the image too, then.
And besides, who knows, in a ten thousand years six digit hands may be considered normal in humans.
So, as long as the hand is not mutilated, but there is an extra finger that appears as it belongs there, or even if all fingers are there, but it looks like the person forgot to paint one of the nails - just ignore that. I know I'm going to.
Cheers!