There are no decal on the rear of the DC5R. Are you referring to the badges on the rear? Or the decals on the side of the car?

If you're referring to the badges, I've removed my "INTEGRA" badge from my DC5R using a hair dryer to heat it up enough (and continue heating) so I can get some fishing wire underneath and slide it across the badge to separate it from the car. Get rid of the adhesive residue using wax and grease remover *IMPORTANT... give the area a good rinse of water after this to also wash away any wax and grease remover fluid from your car (it might eat your paint?) and use a polishing wax (optional, I used Meguirs spray on wax). You might notice an outline of the badge once its removed, since the badge would've been there since the car was made. I used a mild cut and polish to get rid of this outline, and then finish off with wax... now its spotless.

Theres no tabs on the "INTEGRA" badge or anything, so you dont have to worry about filling holes or anything after you remove it. I dont know about the "TYPE R" badge though, I'm fairly certain the "H" badge will leave holes if removed.

Hope this helps ^_^