Hey Autopro, yeah thats my plan on the rear louvers. Thats why the bars are straight across rather than curved. I'm trying to come at this car from another perspective rather than following the real Lambo's way of doing it. Not saying its a better way just different. I can tell already the framing on the hood and rear deck is a little over the top. The thing I like about the thin bar approach rather than rectangular tubing is the distance that the fiberglass has to drop over the edge. I hate having air bubbles and poor bonding.Sometimes its hard to get that fiberglass to follow such a big drop. The fiberglass cloth likes to remain somewhat ridgid and not lay down in the corners as well. So yes glass...Thanks for looking