If done properly, it looks great. I sprayed the tails on my CTS and it looks like the lens were made that way.
Make sure the surface is clean. Then spray a couple light coats. Let it dry, wetsand with 1500 grit paper, clean, then spray another couple coats. Repeat the process until you get it to the shade you want, then wetsand again with 1500 then 2000 grit paper. Clean the lens, then hit it with a buffer and some polish. They turned out so good, my brother swore I replaced the lens instead of painting them until he watched me do the front parking lights.
Make sure the surface is clean. Then spray a couple light coats. Let it dry, wetsand with 1500 grit paper, clean, then spray another couple coats. Repeat the process until you get it to the shade you want, then wetsand again with 1500 then 2000 grit paper. Clean the lens, then hit it with a buffer and some polish. They turned out so good, my brother swore I replaced the lens instead of painting them until he watched me do the front parking lights.