Do you ever clean your exhaust tips? If so, what do you use?
Yeah, I have. It's been awhile ago, but, as I recall, I used Nevr-Dull (
http://www.autogeek.net/eo104.html). I think I sped up the process by also using some super fine steel wool (like the kind you would use in the process of refinishing furniture). Went fairly quickly: had planned on doing just the tips but ended up doing the whole muffler as well (ie the visible portion). It's been long enough they could use it again.
Do you put on top protectant?
Yes, RaggTopp (cleaner and protectant). Been tempted to try the protectant than can be painted on (I forget the name---can be found via a search here), but haven't done so yet.
How are your headlights? Did you plexus those?
I believe I have used Plexus there, but didn't really see any improvement over simply washing them. Wouldn't hesitate to use it again if it seemed like they needed it.