I have bought a number of cars in the past from this dealership when it was Autoworld and very much doubt that this would have gone on in those days. Their bodyshop is about 600 metres up the road from the location shown.
I cringed when I heard that Stonegate had bought the business as they don't seem to have a particularly good reputation in the area in spite of being the main FIAT/Alfa Romeo dealer in the area. The picture certainly doesn't show anything that would make you change your mind about their reputation!
There was briefly a nearby Alfa dealer in Sheffield - Lookers, but since the site was taken over by the Pentagon Group they seem to have replaced Italian brands with Vauxhall at this location.
Can't help wondering what damage was on the car to require rubbing down and filling? There is at least one PDR man in the area who can perform magic on minor dents and can make door dings disappear completely in about 10 or 15 minutes work, including drinking his cup of tea!