I always carry my California Duster and lightly remove the loose dirt and dust. Then use TW Ice detailer. Leaves a nice hard, high gloss shine. I do this daily (sometimes more often). Wax the baby with Meguiar's NXT a couple times a month (using an orbital polisher). It has been washed only twice in the last 5K miles.

My black (scratches and swirls really show) SRT looks better now than when I first got it.