I use Meguiars Gold Class and I think it looks great on my black xfire. I like following up with some Eagle One Wet detail spray for enhanced gloss. I'm not sure why yours looks the way it does. But like the above post said, theres a ton of posts on this in the Detail forum. Make sure your not using the wrong towels, or that the sponge that comes with the Gold Class sometimes gets grit in it that can cause light scratches.