I searched for real photos, as you told me last time, to study from them.
I attached two cylinders, they are exactly the same material and light source. Hope it’s ok for you!
I realized that on the bottom part of these cylinders there is black value where the light is reflected at the bottom part in the dark side, but I didn’t add it, because I didn’t understand what it is !
And I added scratches, but I don’t know why I feel there is something wrong with them!