Has anyone removed tarnish from Gallo tweeter?

In fact I did ask Gallo now. They don't recommend to touch it and I won't (unless someone brave goes first).

This is the only hint I've found. Has anybody tried?

"When I got them, the CDT tweeters were severely tarnished, they looked like they were salvaged from the ocean! But with a Q-tip and some TarnX tarnish remover they look as good as new!"

http://www.audioreview.com/cat/speakers/floorstanding-speakers/gallo-acoustics/PRD_120942_1594crx.aspx