Check me off as another firm believer in the 'bar'.

Once you've given the car a good all-over clay-barring, you should be good to go for a long, long time. A slippery finish right down to the clear coat. Sweet!

But between washings and waxings (actually, I use polish) I'll usually just hit the horizontal surfaces to maintain that slippery shine. In just a few minutes I'll hit the hood, the 'hips' and the trunk of my roadster.