Know I'm late to the party, but insurance or not I'd ALWAYS go to a Stealer for a bodywork repair.
Had a nasty bodged wing on my E36 at an indy. And Mum had a horrible mismatched repair at a 3rd party place on her MG too.
I pretty much smashed Immo's nose in before Christmas and the Stealers had her looking like new again, straight lines, no paint issues, even blew over my rotting wheel arches with the spray gun for me. lovely brand new 118d courtesy car, nice and clean when you get her back. Perfect.
Although to be fair my insurance company did pay them £3200. lol.