Haha, nah man. I don't mean to mess up your brains. As best I know RIM just like SMC are thermoset molding processes that primarily use polyester - it's just a different manufacturing process. I always just thought the top dec was laid Fiberglass and the bottom deck was SMC. On the round noses I'm pretty sure it's fiber glass, I guess I haven't taken a close enough look at my SN top deck to realize what it is made out of!