If you happen to be at Harbor freight pick up a couple of polycarbide disks, they are extremely handy for removing, paint, primer, body filler and rust.
It does wear out faster than a wire wheel however it outperforms a wire wheel hands down leaving clean resurfaced metal.
Here is a link so you can check it out.
http://www.harborfreight.com/4-1-2-h...eel-94017.html
I have noticed on Harbor freight tools their heavy duty units are far superior to their standard ones.