bit of a side track but I have a car that needs the clay treatment - SWMBOs |Smart Roadster. But I have never clayed anything or even seen some clay, back garden excepted.
So where do you get the clay, and how do you use it? SWMBO's car has some very light overspray on the froint where I was using a rattle can on something else in the garage and thats what I want to get rid of.
Halfords or just about any car shop that sells car cleaning products will sell a clay bar
Tear it in half and flatten out a to disk in your fingers
Use Meguairs Detailer spray as a lubricant or a spray bottle with water and a bit of car shampoo
And lightly rub over the paintwork
When the clay gets grubby just squash it up in your hands and flatten out again
If it falls to the floor - throw away