Random Ideas
After installing rear lip for my car... one thing kinda bugs me. How's the bottom flow? I'm pretty sure it's not good having aftermarket exhaust as is, adding lip ads more drag.
Ideally, you want rear diffuser (like Verus Engineering), but having the lip doesn't help.
So next option is make your own... Yay for making more custom parts IDK what I'm doing
Materials
Carbon Fiber: Using carbon fiber would be cool. It's lightweight, strong and bling factor def is there. BUT let's be real here, can I afford that huge sheet of CF? Yes, but is it worth it? Prob not.
Fiberglass: I can try to mold something to fit nicely... but using fiberglass under there is just asking to get broken into pieces.
Metal: Stainless Steel? Pretty heavy. Steel? It rust. Aluminum? Need decently thick to not bend.
Out of all those options, best one I can think is aluminum (5052-H32). Now, what would be the best thickness?
Gotta do a bit more research...