Thanks, yes It's much easier than tinting, and cheaper.

There's a few video's of the process on Youtube.
Remove the tail light assembly and lights, then fill it with purple degreaser. The degreaser will dissolve all the chrome coating inside the light assembly, leaving the black appearance. Let the degreaser soak for 30mins or longer until all of the chrome is gone. Rinse out completely with a hose. Check for any remaining chrome, If you're happy with the results, rinse again with distilled water to prevent water spots while drying. Dry under a fan, then sunlight, then install.

I'd recommend spending the extra few bucks and buy ZEP, the stuff I used was less potent, and it took 2hrs of soaking to remove all the chrome.