No, the mirror coating is relatively easy and just airbrushed on. It's the physical shape of the visor that is tricky.
[url]http://i168.photobucket.com/albums/u191/adeshaw/Props/Cobra/Visor_zps4zxsrjls.jpg[/URL]
Ah thanks Oz! I had no Idea it could be sprayed on. I was thinking it was like a film/sheet that was cut and layed between two layers of plastic. Thanks for being willing to share. Here is a pic of one of the test pulls. You can see how the visor has to go around the two raised bits, but also behind them.