I'm not stripping any paint from the urethane parts. The front bumper I have is OEM but I bought it from a guy that made some repairs on it and primed it. My rear cobra bumper is NOS, so that just needs to be scuffed. Same with the cobra ground effects, just scuffing the clear off. The spoiler is going to get sanded down to at least the original paint. I just want to get the repainted layer off of that. Chemical strippers are a no no on non-metal parts, so I just need to use extra elbow grease!