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.
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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