Can the expression « ne pas payer de mine » mean “one is not a looker”?

Question

Cette vieille musicienne, elle payait pas d’mine, mais elle jouait vraiment bien !

I wonder if the expression « ne pas payer de mine » can only refer to one's deceptive appearance hiding one's true talent or character. Or can it also mean "one is not good-looking physically"?

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I usually associate this locution with this meaning:

Her appearance belies her true talent as a musician.

But can it ever have an alternative meaning of:

She doesn't exactly shine in the physical attraction department, but her musical talent more than makes up for it.

Answer 1

In my experience, ne pas payer de mine is used either when you know that the inner quality of something is better than it looks,

Cette petite brasserie ne paye pas de mine, mais on y mange très bien.

or when you're put off by its aspect and waiting to see if it's better than it looks.

Ce magasin ne paye pas de mine ! [mais j'attends d'être dedans pour voir]

The expression is mostly used to describe things, and when applied to people, it is always neutral or practical/professional-oriented. I've never heard it used to describe someone's lack of physical attractiveness or sex appeal.