Chrome or gold plating mixed materials


I would like to plate some mixed material items for a sculptural artwork, these include a dagger and a replica metal pistol with plastic handles.

Could you please advise me on my best course of action maintaining the items detail in the most cost effective way.

Would I use your copper conductive paint to brush or spay onto JUST the plastic handles as the rest is steal or not? and is this in fact the correct product and course I should follow to achieve an all over chrome or gold finish?

Thanks for your help,