Claying is unbelievable!!
Clay half your bonnet and not the other half and run your finger tips over it.....the clayed half will feel smooth as freshly cut, perfectly clean glass....the other half will feel rough as a badgers bottom, even though it looks clean!
Its also really good for removing tar and tough bug residue, instead of scrubbing with an abrasive pad/cloth/cleaning product clay removes it quicker and without causing any damage.
If your on Facebook Miglior Detailling are worth a follow, they do some unbelievable work.