nickel coating of polmer microbeads

I would like to coat pure nickel on 20-30 micron diameter spherical polymer beads (polystyrene/divinylbenzene). Layer thickness and uniformity are not critical, but desire thin (< few microns) thickness of nickel. Want to coat a few mg of beads, maybe in several different batches (eg, attempts at different nickel coating thickness)to evaluate performance.