Could a binary system of two planets with oceans reflect each other?
The surface of the ocean isn't smooth, so there would not an image formed.

Look at how the Earth's oceans reflect the sun.



(credit: NASA/ESA)

Obviously the sun is reflected by the ocean, but the rough surface of the ocean scatters the light enough for no image to be formed. It would be the same if there were a planet being reflected: No detail would be visible.