Just found out from the below link from previous issues the stone chip etc Fight Club rules for my GT862017MY.
https://www.gt86.org.uk/forums/forums/topic/2491-chips-and-dinks/
Never get behind/beside trucks
Never get behind SUVs
I went to Toyota yesterday to get the very common de laminated rimless Rear view mirror replaced under Warranty, and on the way back went behind a truck on some 50/70mph roads and it chipped my windscreen (Autoglass repair £25 through insurance does not affect no claims) and did about 3 stone chips it seems all at the same time. Found out Subaru paint especially on bumpers is the softest paint in the world, closely followed by Toyota.Someone said in some part to the way car paint now has no lead in it. Touched up the stone chips today, but apparently Aero dynamics of the car allow stones flow freely to the bumper, windscreen and roof.