mould on wedding photo

[Tawe19]

hello

I've scanned in an old family wedding photograph.

Unfortunately the image seems to have gotten damaged by mould, which make it look as though the participants were wearing mouldy clothes !

I can get around the smaller smudges by using the clone tool.

can anyone advise a better approach, especially for the larger sections ?

I am using Gimp 2.10.12

many thanks,

Tawe