Great job! It looks almost exactly like my EVO.
Here is what you can do with the spoiler. First, lightly sand it smooth with fine grade sand paper. Then, paint the middle portion in glossy white. After that, paint the fins in flat black (or glossy black if desire).
As for the rest, you will need to find a Porsche emblem from the front. A "911 GT" emblem for the back. Goodluck!
