C30 Body : Reason for marks on bonnet shut panel?

[2.4TSE]

Decided to take a look tonight as I have a well lit garage and strong sunlight can actually put things in to such stark contrast that they are hard to see.

I believe that the car has never been accident repaired. All paint "spatter", visible primer, and the way that bolts are painted or not is symmetrical from one side of the car to the other and exactly as I would expect from the factory. The metal shut panel has not been straightened, and the headlights both bear production dates a few days apart and several months before the car was built.

The engine however has certainly been out. No doubt about it on close inspection further than the marks that started this thread; all engine mount bolts have tell-tale shiny marks from undoing them as well as tightening them up; the round metal cannister to the right of the first photo has been dropped on to the chassis rail and marked it; all visible bolts for the engine-gearbox flange have marked paint; the two jubilee clips connecting air box to turbo induction pipe are newer and different to the others; the gearbox selector cable conduits have marked their retaining clip from being removed and re-inserted.

Surely though if the gearbox or clutch needed to be replaced it could be done with the engine in situ given the plastic wheel arch liner below the chassis rail level?