I'm rebuilding my old Gary Fisher Hoo Koo e Koo. It's solid but has plenty of battle scars from racing, touring, and the urban jungle. I want to clean the spots with a wire brush and then want to protect the metal from further rusting.

I don't want to us touch up paint though. The battle scars are part of the bike's story now and I want them there but not rusting any further.

Any suggestions? Thanks.