I used this when I debadged, painted, and reapplied my emblems.
http://shop.advanceautoparts.com/webapp ... fragment-3
3M Tape works well too, I just never trusted it 100% for an exterior application. Dont ask me why, I just dont. Used it to mount my HID ballasts though and I had to pry them off with a screwdriver over the weekend. Solid stuff.