I just finished "re-badging" mine. A little nylon fishing line, followed by some "Cleanz-EZ" I got from a body shop supply store was all it took to remove the Mercury and GS badges from the deck lid (no holes). I figured I didn't need the "Mercury" because of the "M" in the center of the taillight reflector. I replaced it with "Zetec 16V" badges from BAT, Inc. The "GS" now resides on the rear door sail panel (along with a duplicate for the other side). Just to be, you know, different.
