I have COMPLETELY debadged the rear of my black 2005 coupe and I think it looks amazing, much cleaner, and if you thought people asked what kind of car it was a lot before... just wait.

With my car, it had been kept in the garage all its life but has a roughly the same mileage as yours Membrillo69. There was noticeable difference between where there had been badging and not, but it was not horrible. I buffed the section several times and finished with a Nano-wax that worked quite nicely. If you stood on top of it with an HID light, you could probably still see some remnants, but to me, well worth it. Mine came off easily and I used a 3M adhesive remover, just make sure to let it sit on the adhesive for several minutes and it will be easy as hell to get off - just do not let it dry on the car, and NEVER attempt in direct sunlight or if your paint is hot.

Hope this helps.