a gt500 and CS bumper are the exact same. the only difference is the way they are painted. i bought a gt500/CS bumper and painted it satin silver over the texture to be like the CS and it looked great. i traded it to holywd for his gt500/CS bumper that was satin silver but painted like a gt500.
point is, you don't need to fill or sand the texture and it will look great CS's have a texture and where it is on the car isn't noticable at all.
point is, you don't need to fill or sand the texture and it will look great CS's have a texture and where it is on the car isn't noticable at all.