Need advice on soft skin tones. (Keumaya figure)

Posted in Custom Workstation

Hey all.
My girlfriend bought me a Keymaya figure for my birthday. She is mostly very good and only needed a bit of heating and modding.
She had a few spots of black on her legs and bum etc. I cleaned these off with alcohol but it has taken the very light air brushing off as well. So she has kind of pale patches on her.
Is there a way to paint this back in using brushes and Citadel paints? Or would it need to be airbrushed to look any good?

Thanks for any advice offered.