Digital BW, The Print

When these "scratches" are described as being so small and nearly impossible to see, and being "spidery" in shape, I'm wondering if mildew growing on or within the paper should be tossed into the mix. We know that a spidery patterned mildew can grow on the glass surfaces of our lenses. I also had a lcd monitor that developed spidery mildew behind the screen; it got replaced by the extended warranty. If the mildew was printed over it might produce just the effect being described. 
 
Perhaps if you provide one free print and the client pays for the reframing, that should be the end of it.
 
Michael K

[Non-text portions of this message have been removed]