Acetone will strip the paint, clearkote or whatever it touches. Then you'll have a dull area which will look terrible.
If your insurance covers it don't mess with it AT ALL. They should repaint the trunk lid as vandalism should be covered and BTDT. My wife's car got keyed down both sides (all fenders and doors) when she parked around some demonstrators that saw a George Bush sticker and flag decal on the car. I had to fight w/ the ins adjuster to get a proper paint job (not a mask and blast)
DDH

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!