that's looking nice.
If you're using Carrara 8, there should be some example shaders included in the "Native content" installer, which are good examples of shader settings.
You can start with one of those and adjust it to whatever you need, and then save it back into your own shader library.
For the Metal shaders, there's a special "lighting model" in the Top level of the shader,. called "Anisotropic" which is for metals, and gives it that streaked highlight. (see pic)
For Chrome,. set the diffuse colour to black, or none,.. and set the reflection to a "value (0-100)" and set that to 100.
For reflections,. you can use a Map (any image), or an HDRI (High Dynamic Range Image) in the " Scene / Background " to provide either just a reflection, or scene lighting and reflections.
In the Renderer options, if you enable Skylight, then the HDRI can be used to illuminate your scene, and provide a source for reflections on objects.
If you don't want the BackGround to show in your final render, and you only want the reflections,. you can use an image in the Scene / BackDrop, which will fit into the camera view, and render out in your image, but won't provide any reflections or shadows.
or you can render to an image format which supports Alpha channel, like PSD or PNG.
If you need more info, advice or answers, jump into the carrara forum,
....I don't want to clutter this thread with examples of shader settings
