im wondering if a material exists, that is easier to machine than metal, but one that is conductive so that it can be plated with copper and then whatever else after for desired metalic finish??

Basically i would love if a conductive machinable plastic or resin existed, one that i could machine and then polish to a perfect finish and then send off to a plating company, something that wouldnt require conductive paint, basically id like the material itself to be conductive so that i could polish it before plating.

Id love if a material already existed but if not, im wondering what you guys thought about adding copper powder to resin and making my own material...would adding enough copper power create a material that would be conductive enough to not require conductive paint?