But all the above said, as long as the shop has to prep everything (the paint, etc.), for the insurance "covered" fix, they probably will work with you on fixing the key scratch too. I would imagine it would be a relatively small additional expense since a lot of the prep work will have already been done. You won't be the first person with some minor additional dings they want fixed at the same time.

Check around. A lot of times the smaller independents can work with you when the larger shops don't have the flexibility (or the pricing).