HELP!

I've been asked to create an applied door covering using 1/8" aluminum plate. The (important) client strongly desires a real hammered finish. Anyone done this on anything large? I've only done it to jewelry and small sculpture.

I'd probably weld an old ball peen head onto an impact chisel bit and go nuts if someone doesn't stop me! The door is 42' x 8' 10" and done on both sides so it should probably be some kind of tool...

thanks!