Aftermarket Radio

[First Hummer]

I am going to install my own Aftermarket radio this weekend or sooner.I am not into the whole nav or dvd thing,so Iam going with a Double Din unit from auto toys.I picked up the Pac os-2 along with the CM1 module for the door chimes.They have a few universal dash kits and trim kits.Install looks pretty straight forward cross my fingers.Could anyone tell me how to remove the metal cowel around radio without to much scratching.

http://www.autotoys.com/x/catalog/PYRAMID_CDRCS91MP_MP3...IN_RADIO_p_5579.html