Hi Magnet, sorry I missed your post somehow. Thanks for including the level of detail you went into.
I have had the cars since mid June, bought from synther audi west London. When I worked close by. Now back home in northern Ireland and have completed 10000 mils roughly. I clean car myself like all my cars with autoglym products. A d never had any bother before. Try do to it every 10 days or two weeks .
Road conditions are generally not bad mostly motorway driving. Or main roads.
I think the rear quarter panel is very strange and no physical chip. And no one has ever been in the back other than a car seat on the other side.
The cill may have been something but I don't remember what it could have been? And front bumper maybe a stone chip but it looks more like a flake than a chip. Ut again I am no expert. And would be better getting paint depth tested.
Yes paint work was seen and looked in good order as it was all prepared for showroom. An it was second hand d so didn't expect a new vehicle.
I will try and get better pictures in daylight tomorrow.