Turns out transparent aluminium does actually exist: http://www.atomicmpc.com.au/News/151361,transparent-aluminium-now-a-reality.aspx http://www.atomicmpc.com.a

Turns out transparent aluminium does actually exist: http://www.atomicmpc.com.au/News/151361,transparent-aluminium-now-a-reality.aspx http://www.atomicmpc.com.au/News/151361,transparent-aluminiu... Though I doubt they'll be making planes out of something explosive.