Easiest paintjob you can do really for the result given, most bang for the buck really. Simply clean and prep for painting like normal then spray flat black paint formulated for plastics, I use Rustolium that specifically says it bonds to plastic. After the black dries, use the Rub n' Buff either on your finger, a cloth rag or paintbrush and apply to the raised surfaces and allow the black to still show in the cracks and crevices. Allow to dry then buff or polish to achieve that metallic glow with a cloth. https://www.amaco.com/t/mixed-media.....hes/rub-n-buff

Examples:

https://www.furaffinity.net/view/38404458/

https://www.furaffinity.net/view/23439555/

https://www.furaffinity.net/view/11391800/

https://www.furaffinity.net/view/11641865/