i thought that vis had a poly one? that there 300 dollar one was the fiberglass, and then it was poly, then cf...but i may be confused. i know the shine is frp though....and ed and forcewerkz make poly versions...i know ed is bad, but idk bout the forcewekz, link below

http://www.forcewerkz.com/nissan-350...-polyurethane/

 

https://my350z.com/forum/body-exteri...rsports-7.html

pm some of them i bet they can tell you