Step 4 - Advanced Gloss Effects
This part may be tricky for newer users.

With the selection from last step still selected, create a new layer, name it "Advanced Gloss". This is for the specific shine at the top. Grab your brush tool, I set it to about

320px, color white, hardness: 0

All it takes is one click of the mouse, upper middle of the selection. It doesn't look very much like the gloss right now, but it will in a few seconds. Deselect your selection, grab your rectangle marquee tool and set the feather to 20px. Draw a marquee over most of the gloss but leave the top part. Once it is selected, hit the "Delete" key, and watch all disappear except for the top part, thus giving you your gloss. To make it fade a bit more, set the layer opacity to 60%

Next, Deselect everything, select the original Gloss layer, grab your rectangle marquee tool and set the feather to 20px, a little below the gloss you just created, make a rectangle, hit delete, this should make the small gloss you had for that area disappear, giving it depth. (it also might be a good idea to burn the original layer a bit to make it darker)