Remove makeup

[Tero Ahlfors]

[Gigi Marzo] “I am not skilled but I have to do it absolutely.”

If you have no clue what you’re doing and you want to do something hard/semi-impossible then I hope you have money so you can pay a professional to do it.

[Juan Manuel]

I think that it will be less hard to use color correction to desaturate the makeup (if that works for you) rather than rotoscoping.
Draw masks around the lips and (a second mask) for the eyes, duplicate the layers so you have a layer with only the mouth (since everything else is outside the masks) and another with only the eyes, and apply color correction only to the hues of the lipstick and the eyeliners, so they aren’t that prominent.