I've got a 2006 Tacoma whose finish has been mucked up by water spots - they are definitely etched in. I've maintained the finish since new with Klasse products as well as Sonus (I usually use a combination of a clay bar and Klasse All In One). So these water spots didn't respond to washing, nor to a clay bar, nor to Sonus SFX-1. So I bought CarPro Spotless Intensive Water Spot Remover and scrubbed the heck out of some areas - no improvement. Help !!!