[zganie]

1)place a glossy sheet of paper covering your entire scanner bed

2)scan entire bed at 72dpi/rgb image,leve remaining scanner setting at default

3)open image in photoshop adjust EQUALIZE,any area that did not scan as fully white will appear as dark splotches

4)as you scan in the future,avoid the placing photos in blotchy areas in the scanner are
Note this should only produce a few dark areas
Also make sure your scanner is CLEAN before you start

hope this is helpful Zganie

[DannyRaphael]

Just found your post. Great idea. Thanks for sharing your insights.