Do you think women should wear makeup to a job interview?
If the barn needs painting, then bust out the brush.
It's entirely her choice and depends on the job. A trucker or miner it'd be kinda silly imo. But I probably would, just light like I normally do when I wear it.
She should wear what she normally wears. There are some exceptions -- fashion & beauty industry.
What if she is not a typical makeup wearer?
Then she doesn't have to I guess. She's applying for the job so it's up to her to get hired and impress the new boss. How she does that is up to her.
Totally up to her, whichever she feels most confident doing and presents her the way she sees herself. Many women, if not most, do not benefit at all from wearing makeup.
Natural looking yes.
Interesting split between gender and ages.