The photo is my original and a metre long, so I can only scan the left and right without cutting it, which I am reluctant to do. I will try to find another solution - perhaps to photograph the photo .....

I have not had time to Photoshop out the dust, but perhaps the original can be cleaned better. Does anyone know the specialist fluid to use? I could probably find out but to be honest I am a bit pushed for time .... (CS)