GTechniq - Car Care Products - G - Wash - 250 ml Description G-Wash has been specifically formulated to work best with GTECHNIQ’s range of coatings. G-Wash produces a high foam content which both breaks the bond between the dirt particles and your vehicle’s paintwork and lubricates particles thereby enabling the safest possible removal of traffic film. Used in conjunction with GTECHNIQ’s coatings G-Wash will ensure maximum gloss retention.