im going to tell you the same thing i was told...

to make something look metalic you need something to reflect to see that it's metallic

and as i said in your first post:
assign mia_material_x and click preset > Chrome in the attribute editor
(hold down right button on object, go to assign new material, look for mia_material_x and let go of the right mouse button, then in the attribute editor (if it didn't pop up automatically hold right click on the object and let it go when you're on 'material properties) and at the top where there is a button preset click on that and select chrome)
you need something to reflect as well... so pop in some other objects or something

alternatively, since you're new, in your blinn shader set the colour to black (they say chrome is black, and after looking at it i'd say they're right)
boost up the reflectivity to 1,
change the reflected colour to white

and just alter those three settings from there until you get something you're happy with.

hope that gets you started