I don't know if this is of any use to anyone:
Instructables: Chrome Plating of Car Headlights and Parts (http://www.instructables.com/id/Chrome-Plating-of-Car-Headlights-and-Parts/)
Kits:
Bright Copper Plating Kit (http://www.gaterosplating.co.uk/Copper-Plating-Kit.php)
Nick (http://www.gaterosplating.co.uk/Nickel-Plating-Kit.php)el Plating Kit (http://www.gaterosplating.co.uk/Nickel-Plating-Kit.php)
Replica Chrome Plating Kit (http://www.gaterosplating.co.uk/Replica-Chrome-Plating-Kit.php)