Rendering Realistic Chrome Photoshop tutorial
Now I just duplicated the top side and moved it down and rotated it
Chrome is very reflective so you have these shades of light to dark and dark to light. This can be a gradient like where you see a smooth transition from or you can see a sharp transition. Make new Layer set the mode to overlay, get the brush tool 20% opacity get color white and with a brush make a nice stroke right down the middle. this will further enhance the chrome highlights.