That looks great. I would definitely do it!

There's a guy who lives near me with a black coupe with that kind of spoiler (not molded though) and it doesn't really pop out at all. but with the blue it looks really natural but eye catching.

 

Since this one extends past the trunk over onto the rear quarters, it would have to be molded in 3 pieces. Would be really expensive, but if you have the funds and the dedication, the end result will be totally worth it. If you cheaped out and only molded the center section and lopped off the sides, it would look out of place, completely defeating the purpose of molding anything in the first place.