I've already cleaned my ES wheels a few times at the local car wash but of course some of the brake dust isn't coming off with my Black Magic "no scrub" wheel cleaner but it is rated very poorly.
I was curious about trying some brake dust sheilds...
http://www.autobarn.net/xxkleen.html#bottom
They fit a 2004 Civic Hybrid, which is the second set of wheels I bought for my mirage.