imho...
go JDM thin side moldings. The paint you use will eventially fade (if youre using spray paint) and thin side moldings aren't too expensive.
If you do decide to paint it, just tape off the side moldings and the mirror and then spray paint them; not very tough to do as long as you do the appropriate preperation work. AKA wash and clay them, and then spray paint them and make sure you tape/newspaper off your body and your window.
HTH
-Jake