A member was asking about coating plastic with chrome (cant remember who mentioned it) I was trawling through ebay and i found a kit that will coat copper on to plastic. The process is called electroforming as opposed to electroplating. The kit contains graphite powder which i assume helps the copper adhere to the plastic. If the copper adheres to the plastic sure you could coat the copper with chrome or a chrome substitute
https://www.ebay.co.uk/itm/Copper-Electroforming-Kit-for-plating-non-metals-plastics-and-organics/264137238000?hash=item3d7fce65f0:g:95wAAOSw3uFa7Ajy:rk:2
f:1&frcectupt=true
https://www.ebay.co.uk/itm/Replica-Chrome-Brush-Plating-Kit-for-bike-car-and-boat-restoration/254070664377?hash=item3b27caacb9:g:yTMAAOSwsc1a7Btb:rk:5f:1&frcectupt=true
https://www.ebay.co.uk/itm/Copper-Electroforming-Kit-for-plating-non-metals-plastics-and-organics/264137238000?hash=item3d7fce65f0:g:95wAAOSw3uFa7Ajy:rk:2
f:1&frcectupt=truehttps://www.ebay.co.uk/itm/Replica-Chrome-Brush-Plating-Kit-for-bike-car-and-boat-restoration/254070664377?hash=item3b27caacb9:g:yTMAAOSwsc1a7Btb:rk:5
f:1&frcectupt=true
