just throwing my 2 cents into the mix aswell. Im a groomer for work and we start by washing the car then going over the whole thing with prepsol then using our cutting compound by hand to get the light scratches out then a buffer for the deeper ones. Then time for another wash to get all the excess product off then we go through and clean door shuts boot shut and under the bonnet while spraying silicone over all the plastics to bring up that nice shine then we do windows inside and out then finally time for hand polish. we use comercial grade stuff from pacer and it is amazing! bloody expensive though. o and dont forget to lightly wet whatever you use to apply the polish, it will make it go further. The tricks of the trade