(Not sure if others have already done this)
I did a Hardcoat Anodize finish, producing a durable surface...
haven't put it to actual testing yet... but with past experience w/ hardcoated parts, it should be good.
Hardcoating can also be done in different colors (these were done "clear" which results in a bronze-grey color)
Google:
"hard anodizing"
"hardcoat"
"MIL-A-8625 Type III"
http://www.ihccorp.com/IHC-Hard_Anod.htm
CJ