My guess is that you are talking about the reflections on the surface of the glossy print itself. In pp, the only way to mimic this would be to artificially create some reflections on the digital image. This is possible, but requires some skill and knowledge of lighting.
|Rotting Gracefully by Mond|
from Natural Decay
|attic by wgjohnston|
from In the attic, or in the basement!
|Ox Bow Aspen by McFrost|
from cell phones - nature photographs