Actaully the Erion Cans are pretty cool to the touch after a ride too. My wife has one on her F4i and I thought I'd give it a test the other day so after riding for a while I got off the bike and grabbed the body of the can (not the polished tip, I'm not that stupid) and was suprised that it wasn't that hot at all, warm, but nothing that would burn skin or melt shoe. I don't know what that Black Satin finish is, but it does the trick.
As a side, mine are supposed to be in on Monday. I'll post up some pics after the install.