So it's nice in a perverse way to get the first damage done and out of the way...
I'd rigged a temporary fluorescent light, which the open trunk lid nudged as I pushed the car back in the garage.
From my viewpoint at the front of the car I car I watched in slow motion as it wobbled, then tipped up, slid down the trunk and stabbed the rear scuttle. It then fell across the car and slid down the side and hung from it's power lead, clonking against the freshly painted side.
Ya couldn't make it up
By some miracle, the scuttle was the only damage so I'm quite relieved! I've touched the scars in with a paintbrush and that's how they'll stay for now.
No-one will believe you...