in order to electroplate you need the following.
a conductive surface on the object to be plated (graphite powder would accomplish this)
the object to be plated and the surface coating (if needed/present) need to be able to
withstand a caustic (generally acidic) solution.
many plating solutions are warmed to close to boiling temps so the object needs to be able to handle the heat.
buoyancy, the object needs to be submersed, so if it floats it needs to be weighted.
surface should be non porous. (you don't want it dripping cyanide solutions that got trapped inside of pores.
that being said, electroforming is a really cool process,
you can model a object that you are only partially plating, for example make a face relief
and just plate the part you want and then melt the plastic away. offers some interesting
possibilities for making thin wall highly detailed models.