The reason your friends 300zx's body kit is off on the color is because who ever painted it doesn't know how to spray a let down panel. That would have made it easy to get a perfect match, even though pearls are one type of paint that is a MPITA to match.
Your hood would be cake to match to the rest of the car, but it would have to be blended into the fenders if done right. That wouldn't be that much to do.....