I drilled out the rivets slowly as they want to spin on ya, Then after all the rivets fell out the back side onto the ground I started with a heat gun on LOW setting and SLOWLY pulled up as the nasty glue let lose, after its off you will have a ton of glue where the plate was.
I used 99% rubbing alcohol and a bunch of blue shop towels, Make sure your not dripping the alcohol on to any of the other plastic, it will may fade it some, After all the glue was removed, I used 303 on the plate area to bring back the shine.