Just do like Pub 24/7 says.
I did this about a month ago with a $5 silver paint pen from one of those Riot craft shops. Just take the garnish and tail lights off the car and take your time. Cos your painting on a ridge, its a lot easier. Just keep the pen straight.
I was even able to do the right tail light when it was still attached to the car...
It's not that hard mate. Took me about 30mins to do all of it. Also i havn't put a clear coat on it. If it fades, out comes the pen again.