The silver fluids and the models seen in this ad are all Machine Shop.
The cars were CNC cut from foam then finished and painted silver. The models had to be accurate so the movement of the liquids around the contours of the car matched the real thing which was later added in post.
a huge amount of our specially thickened liquid formula was placed in a huge tank at black island studios and various rigs were built to suspend the car and drag them through the liquid to produce to lovely shapes you see in the final ad.
There was also a rather funny incident where one of beloved technicians Glen, fell into the tank and came out silver. (see picture)