3M discs

[makoshark]

Those work, but can be a bit time consuming. If you have a 4" or 4 1/2" grinder, then you could use a course wire wheel. Those are faster, but can still be a bit time consuming. I usually use a razor blade to take off the paint if it has laquer primer. You can strip the paint off of a fender in about 15 minutes that way. Then I take a 36 grit sanding disc on a grinder and quickly work over the fender to rough up the remaining paint, but not quite go to the bare metal and then move over to 80 or 100 grit on a da sander and bring it down to bare metal. Best method I`ve found just shy of sandblasting.