Going on my past experience with VW's so called approved body shops for corrosion warranty work, I wouldn't be comfortable using them again. If they mess it up, or even leave the slightest trace of overspray, it will be obvious that it has had paint. They may get the colour right, but if they have to blend into the door, where will they mask off. I'd be suprised if they'd take the window scraper off, or the mirror for that matter, so look closely and you'll see an edge. That will put many enthusiastic buyers off.
What colour is the car? Could it be de-nibbed, flatted and polished back up?