Alclad can be very convincing.
I do a few plastic models at times and have used this for bare metal finishes on aircraft. You need to spray the area with gloss black first. This needs to be a very smooth and glossy black finish. You then airbrush the Alclad on over the top in very light, mist coats.
The result is fantastic.
Here is the black coat, Thinned Humbrol enamel airbrushed on. 1:48 P-38 Lightning model.
Here is the Alclad over the top. This is the polished aluminum finish, not chrome, the chrome will be even brighter.
And the finished model. The finish was weathered and dulled though as the polished aluminium was too bright for me.
Here's another one I did in Alclad dull aluminium finish.
I have used the chrome finish on the inside of a poly-carbonate RC car and that does look like Chrome. You have to do it in reverse though on a clear body, spray the Alclad first then back it up with black to give the effect.
Unfortunately though it isn't durable. It will rub off if you handle it too much so maybe you need a clear lacquer over the top.
Craig.