Ok alot of people take the badges off to fid holes and either simply put em straight back on or spray them to match the bodywork. Over here its the 'in' thing to do to rub off the silver paint and just have Black 'Citroen' and 'saxo'.
Some people also fill the holes and stick new badges on like I did
Mine are 'Citroen' off a Picasso, 'Sport' off a Cilo and 'VTS' off the current C2 VTS
Not to everyones tastes but then it was only a temparyu measure that seems to have stay'd.
Works out cheaper than welding the holes and sparying the complete hatch.
All depends on how much you want to spens, how different you want the car to look and at the end of the day its simply personal tastes :-)