Found this corrosion on the rear axle, inside the large centre hole. There are two areas - the obvious one and the orange patch behind it.
(Please click the link, I have tried to embed Google Photos and Flickr links but cannot get the image to show, sorry. Yes, I read the How-to. If a kind person can insert the image for me, and tell me how, I would be grateful, thank you)
https://photos.app.goo.gl/GPy17mQJSuprkfn28Anyone else had corrosion like this here? It is unlikely to be damage - too hard to reach or even photograph well!
It is not too deep yet so I will repaint it but only after approaching my dealer and arguing that they may have damaged it when replacing the rear disk carrier and rear wheel bearing. Or that the paint is not good enough (joke, given the paint on the final drive....)
Cheers,
A