If you look at this post I had the most faded oxidized swirled black paint I've ever seen, I used IP via rotary and you can see the hood shot, it erased all the fading. I followed with ZPC and the paint looks better than new, until you get right up close that is but I'm lucky not to repaint for a couple years. If your not comfortable using the machine, I wouldn't hesitate to give psstue a shot.
http://autopia.org/forum/showthread....highlight=deal
I'm telling you that hood shot is not dirt, it's after wash and clay and the black half is after one slow pass with IP and a yellow pad!