I started out using Plexus, then found Pledge worked pretty good for a lot less money, but now I put on an application of car wax every month or so. I've been using turtle wax - it was on sale at the time and the tin is about large enough to last four lifetimes.
Bugs and road grime wipe off after a bit of a soak in hot water, no need for soap or detergents.
If you're all about the destination, take a fucking flight. - Frank Turner
Got brap, and twice as much fuel as you. - Akarob