Spray Chrome

Hi,
I'm doing a couple of Car restorations and would like to learn a little more about this process. I will mainly be restoring chrome pot metal interior and exterior parts but will also do some plastics. Nicamarvin said there was a slightly different mix-ratio of the Angelgilding silvers---would like to know that. Also for prep: Should the basecoat be black/grey/or other color 2K PU paint? Should the 2K PU topcoat be tinted to make the Chrome look? (I have been told the result may be a gold tone if PU is not tinted) Are multiple topcoats OK for added durability or would this dull the finish?
Thanks for all the previous posts!