Dodo Juice Purposeful Purple Medium Clay 200g
A clay bar might sound like the kind of nightspot that plays ABBA a little too frequently, but it's really the detailer's best friend - a soap sized chunk of putty that plucks embedded contaminants out of your paint.
You'd be amazed what the sticky wonderbar removes... tar, bug remnants, tree sap, iron fallout, meteorite dust and anything else invisibly coating your car's paintwork. Just make sure you use it before you wax (as it will probably strip that off too) and don't drop it on the floor. Unless you want to drag half the car park over your bonnet.
The Purposeful Purple is a heavy grade 'medium to coarse' clay. This makes it unsuitable for soft and medium-hard paints, where marring may occur. It should therefore only be used for heavy contamination removal (paint overspray, when finer grade clays have failed etc.) by claying ninjas on hard paint. Mere mortals should go for the Supernatural Medium Grade clay instead.
Finally, the Purposeful Purple is also the original 'seven patent' heavy grade clay devised in Japan, so you'll be buying a little bit of detailing history.