I love the metal, but..
I am a metal guy at heart, and love wheeling,hammering and forming metal more than anything. Back in the 30's and 40's almost every airplane had artwork in metal all over it,and fiberglass wasn't even a word yet.. I deeply pondered making all my -4 glasswork out of metal, especially after seeing the -6 mentioned. But, I also make my living repairing,maintaining and restoring airplanes and can say the metal cowlings are not easy to keep from shaking apart and wearing into everything. In the RV arena, I believe we are far better off with the fiberglass components for durability and repairability. On a metal note, the Hughes Racer replica (now long gone) made me drool...pure beauty.