What the Dark side is talking about is something like the 3M "Clean'N Strip" disc #07460. Sunchaser tools has large 8" disc (click here)
. Or 3M "Surface conditioning discs" #07451 as an example. There are about 20 numbers in the line with different "grits" and diameter of disc.
These products remove paint with ZERO damage to metal is used properly. They are really need tools. The coarser ones will remove some metal, I use them to smooth welds all the time. But you have to bare down pretty good so even they can be used to strip paint without marking the metal. I even used them to strip the "sweated" brass off my brothers vintage Harley frame without any damage what so ever to the surrounding metal! Very cool tools indeed.