I've used the claybar and was amazed how much grime and muck it could pull out even after a good wash. It struck me as a very good alternative to removing paint. If your paint finish is good, as yours is, and its just ground in dirt, tar spots etc., that you need to remove I really would recommend that you give it a go.
Don't leave your claybar in the sun or in a hot place! It turns into a sticky horrible 'chewing gum' like mess.........I really must get a new claybar :embarassed: