How do you remove a moustache from an old black and white photo?

I have a photo of my grandfather, but he had a toothbrush moustache. I want to remove the moustache and display the photo in my home.
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The toothbrush moustache had nothing to do with his political ideologies or anything like that. It was in fashion at the time.
Update: Update: I already made a digital copy from a scan. I was wondering how to remove it from that
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