Occasionally you’ll sully your car with something that just won’t come out in the wash — for instance, overspray from spray painting in the yard on a windy day. A clay bar kit provides the easiest answer; it’s less work than the elbow-grease alternative and less likely to mess up the finish.
Meguiar’s Smooth Surface clay bar kit contains everything a beginner at extreme automotive beautification will need: two clay bars, a mist and wipe spray, and a microfiber towel. The kit runs about $22 on the street, but Amazon sells ’em for $16.
If you can’t see the point and have no idea what a kit like this would “fix” on your car, then you’d better give up your dream of becoming a clean-Nazi — you’ve just missed the first requirement.