Aaron's tutorial is pretty good — that whole reflections with curved objects thing can definitely be tricky. I like that he manually hand paints in part of the reflection, and that's a skill that anyone whole wants to get serious with image manipulation and creation should try hard to master. Rather than paint in the darker band under the can, I'd have been inclined to stroke and blur an elliptical selection, just to keep it tidy.
BTW I have posted here befoer, but not for a while. I usually live on the Adobe forums, but they have been getting short of interesting content recently, and you have some stand out content here.