Has anyone used a waterless polish before? I've just come across one and it looks pretty cool, it states that you can just spray directly on to the dirty car and buff off with a microfibre cloth as the formula lifts the dirt from the paintwork.

It's called Smart Polish Pro

 

If you are going to use waterless wash/polish, be sure not to scrub the dirt into the paint, and if your car is really dirty I recommend the 2 bucket wash method to avoid marring.