I've got a moon White VRS estate that looks great when it's clean, but the rear gets dirty very quickly. Sometimes I could do with washing just the rear sections, but having got out the buckets etc end up washing the whole car. I was thinking about getting a waterless product, so I could just wash the rear sections to keep those looking clean like the rest of the car. I was thinking of getting Maguiars. Any opinions or other recommendation?

I use greased lightning which is pretty good stuff.

I use a waterless wash sometimes but never on a pure dirty car, I always wash the required section with shampoo & water first & then do a quick spritz over with a waterless wash system, can recommend any of the 3 below & they all give a great shine with some added protection.

 

Grease Lightning, Williams or Mastersons.

 

http://www.ebay.co.uk/itm/Greased-Lightning-SHOWROOM-SHINE-Waterless-Car-Cleaning-Wash-Wax-Polish-/120991460013?hash=item1c2ba72aad:g:XvkAAOSwll1WwzBa

 

Williams you can get from Ideal world but wait until the 3-4 bottles are on offer for £20.00-£25.00 as it's normally £14.99 per bottle 

 

http://www.slimsdetailing.co.uk/masterson-s-waterless-wash-shine-473ml.html